Portugal
/
Sintra
/
September

Sintra Weather in September with Sea Temperature

September weather in Sintra includes average daytime air +23°C, nighttime +18°C, average sea temperature +22°C. Daily water temperatures usually range from +21°C to +23°C, which is mild for beach planning. The tables below also show air temperature, wind, rain and humidity; for near-term water data, open the current 30-day water temperature forecast.

Today 14 days Month

September October

November December January

February March April

May June July

Show all

Today 14 days Month August September October November

Averaged values across several years

Daily air temperature for the month

Day Night

Daily sea water temperature for the month

Water

Tap a date to open detailed weather for that day

September	Day	Night	Sea t°	Wind	Precip	Humidity
1Mon	+23°C	+17°C	+22°C	5 m/s	0.1 mm	78%
2Tue	+23°C	+17°C	+22°C	5 m/s	0.1 mm	78%
3Wed	+24°C	+17°C	+22°C	5 m/s	0 mm	74%
4Thu	+24°C	+17°C	+23°C	6 m/s	0.3 mm	72%
5Fri	+24°C	+17°C	+22°C	5 m/s	0.3 mm	74%
6Sat	+23°C	+18°C	+22°C	4 m/s	0 mm	73%
7Sun	+24°C	+18°C	+22°C	4 m/s	0.3 mm	78%
8Mon	+24°C	+18°C	+21°C	5 m/s	0.1 mm	77%
9Tue	+24°C	+18°C	+21°C	5 m/s	0 mm	77%
10Wed	+24°C	+18°C	+21°C	4 m/s	0.2 mm	77%
11Thu	+24°C	+18°C	+22°C	4 m/s	0 mm	74%
12Fri	+24°C	+18°C	+22°C	6 m/s	0.9 mm	78%
13Sat	+24°C	+18°C	+22°C	6 m/s	1.1 mm	76%
14Sun	+23°C	+18°C	+22°C	4 m/s	1 mm	78%
15Mon	+24°C	+19°C	+21°C	4 m/s	0.1 mm	76%
16Tue	+24°C	+18°C	+21°C	4 m/s	0.5 mm	73%
17Wed	+24°C	+18°C	+21°C	5 m/s	0.6 mm	70%
18Thu	+24°C	+18°C	+21°C	4 m/s	0.5 mm	68%
19Fri	+24°C	+18°C	+22°C	4 m/s	0.3 mm	71%
20Sat	+23°C	+18°C	+21°C	4 m/s	0.1 mm	78%
21Sun	+23°C	+18°C	+21°C	5 m/s	0.6 mm	71%
22Mon	+23°C	+17°C	+21°C	4 m/s	0.1 mm	68%
23Tue	+22°C	+17°C	+21°C	4 m/s	0.1 mm	72%
24Wed	+23°C	+17°C	+21°C	4 m/s	0.2 mm	70%
25Thu	+23°C	+17°C	+21°C	5 m/s	0.3 mm	70%
26Fri	+23°C	+17°C	+22°C	5 m/s	0.1 mm	72%
27Sat	+23°C	+17°C	+22°C	5 m/s	0 mm	74%
28Sun	+22°C	+17°C	+22°C	6 m/s	0.1 mm	73%
29Mon	+24°C	+17°C	+22°C	6 m/s	0.2 mm	70%
30Tue	+24°C	+17°C	+22°C	5 m/s	0 mm	71%

Sea water temperature by months

Water +22°C

Day and night air temperature

Day +23°C Night +18°C

Weather highs and lows in Sintra for september

Warmest day: 12 september, +24°C
Coldest night: 23 september, +17°C
Max precipitation: 13 september, 1.1 mm
Warmest sea water: 4 september, +23°C
Coldest sea water: 8 september, +21°C

Climate in Sintra in september

Average daytime temperature: +23°C
Average nighttime temperature: +18°C
Sea water temperature: —
Precipitation (monthly average): 7.9 mm
Days with precipitation: 2.5
Humidity: 74%
Wind: 5 m/s
Data: 6 years / coverage 100%

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

September	Day	Night	Sea t°	Wind	Precip	Humidity
1Mon	+23°C	+17°C	—	6-7 m/s, NNW	0 mm	72%
2Tue	+23°C	+17°C	—	4-5 m/s, WNW	0 mm	78%
3Wed	+23°C	+18°C	—	4-6 m/s, NW	0 mm	84%
4Thu	+22°C	+18°C	—	8-9 m/s, NNW	0 mm	71%
5Fri	+23°C	+17°C	—	7-8 m/s, NNW	0 mm	71%
6Sat	+23°C	+17°C	—	3-4 m/s, SW	0 mm	69%
7Sun	+23°C	+18°C	—	4-8 m/s, NNW	0.8 mm	83%
8Mon	+21°C	+17°C	—	8-10 m/s, N	0 mm	73%
9Tue	+22°C	+17°C	—	9-10 m/s, NNW	0 mm	71%
10Wed	+23°C	+18°C	—	6-7 m/s, NW	0 mm	86%
11Thu	+24°C	+17°C	—	6-7 m/s, N	0 mm	79%
12Fri	+24°C	+17°C	—	6-8 m/s, N	0 mm	78%
13Sat	+23°C	+17°C	—	7-8 m/s, NNW	0 mm	71%
14Sun	+24°C	+18°C	—	6-8 m/s, NNW	0 mm	82%
15Mon	+25°C	+17°C	—	8-10 m/s, N	0 mm	79%
16Tue	+25°C	+16°C	—	6-9 m/s, NNW	0 mm	72%
17Wed	+25°C	+17°C	—	4-5 m/s, NNW	0 mm	62%
18Thu	+27°C	+20°C	—	3-4 m/s, NW	0 mm	45%
19Fri	+25°C	+20°C	—	2-3 m/s, SSW	0 mm	60%
20Sat	+24°C	+17°C	—	5-9 m/s, NNW	0 mm	77%
21Sun	+20°C	+16°C	—	9-10 m/s, N	0 mm	67%
22Mon	+21°C	+14°C	—	9-11 m/s, N	0 mm	57%
23Tue	+23°C	+15°C	—	5-7 m/s, N	0 mm	59%
24Wed	+24°C	+16°C	—	3-5 m/s, N	0 mm	50%
25Thu	+24°C	+17°C	—	3-4 m/s, W	0 mm	50%
26Fri	+22°C	+17°C	—	3 m/s, WNW	0 mm	55%
27Sat	+21°C	+16°C	—	5-9 m/s, S	0.2 mm	78%
28Sun	+21°C	+17°C	—	10-12 m/s, N	0.4 mm	88%
29Mon	+24°C	+16°C	—	7-9 m/s, N	0 mm	76%
30Tue	+26°C	+17°C	—	3-5 m/s, N	0 mm	70%

Weather highs and lows in Sintra for september

Warmest day: 18 september, +27°C
Coldest night: 22 september, +14°C
Max precipitation: 7 september, 0.8 mm
Warmest water: —
Coldest water: —

Climate in Sintra in september

Year: 2025
Average daytime temperature: +23°C
Average nighttime temperature: +17°C
Water temperature: —
Precipitation (month): 1.4 mm
Days with precipitation: 0
Humidity: 70%
Wind: 6 m/s

Daily air temperature for the month

Day Night

Daily sea water temperature for the month

Water

Tap a date to open detailed weather for that day

September	Day	Night	Sea t°	Wind	Precip	Humidity
1Sun	+23°C	+18°C	+22°C	7-8 m/s, NNW	0 mm	81%
2Mon	+21°C	+16°C	+22°C	8-11 m/s, NNW	0 mm	82%
3Tue	+20°C	+16°C	+22°C	10-11 m/s, NNW	0 mm	73%
4Wed	+23°C	+16°C	+23°C	8-9 m/s, N	0 mm	74%
5Thu	+21°C	+16°C	+22°C	8-11 m/s, NNW	0 mm	75%
6Fri	+20°C	+15°C	+22°C	7-8 m/s, NNW	0 mm	68%
7Sat	+21°C	+16°C	+22°C	3-4 m/s, W	0 mm	77%
8Sun	+21°C	+16°C	+21°C	5-6 m/s, NNW	0 mm	80%
9Mon	+22°C	+17°C	+21°C	6-8 m/s, NNW	0 mm	82%
10Tue	+21°C	+16°C	+21°C	8-9 m/s, NNW	0 mm	82%
11Wed	+23°C	+17°C	+22°C	9-11 m/s, N	0 mm	73%
12Thu	+22°C	+17°C	+22°C	10-11 m/s, N	0 mm	80%
13Fri	+24°C	+17°C	+22°C	7-10 m/s, NNW	0 mm	76%
14Sat	+24°C	+18°C	+22°C	4 m/s, S	0 mm	66%
15Sun	+27°C	+19°C	+21°C	4-6 m/s, N	0 mm	50%
16Mon	+27°C	+19°C	+21°C	3-5 m/s, NNW	0 mm	41%
17Tue	+26°C	+20°C	+21°C	3-4 m/s, NE	0 mm	41%
18Wed	+23°C	+17°C	+21°C	3-5 m/s, S	0 mm	68%
19Thu	+22°C	+17°C	+22°C	3-4 m/s, S	0 mm	81%
20Fri	+22°C	+17°C	+21°C	4-5 m/s, SSE	0.1 mm	75%
21Sat	+23°C	+19°C	+21°C	2-3 m/s, SW	0.1 mm	68%
22Sun	+22°C	+17°C	+21°C	3-5 m/s, NW	0.2 mm	70%
23Mon	+21°C	+16°C	+21°C	5-6 m/s, NNW	0 mm	76%
24Tue	+22°C	+16°C	+21°C	3-4 m/s, WSW	0.2 mm	83%
25Wed	+23°C	+19°C	+21°C	4-6 m/s, SW	1.3 mm	93%
26Thu	+22°C	+18°C	+22°C	6 m/s, W	0.4 mm	92%
27Fri	+21°C	+16°C	+22°C	5-7 m/s, NNW	0 mm	70%
28Sat	+22°C	+14°C	+22°C	5-6 m/s, N	0 mm	59%
29Sun	+23°C	+16°C	+22°C	3-4 m/s, NNW	0 mm	54%
30Mon	+24°C	+17°C	+22°C	4-6 m/s, NNW	0 mm	67%

Weather highs and lows in Sintra for september

Warmest day: 15 september, +27°C
Coldest night: 28 september, +14°C
Max precipitation: 25 september, 1.3 mm
Warmest water: 4 september, +23°C
Coldest water: 8 september, +21°C

Climate in Sintra in september

Year: 2024
Average daytime temperature: +23°C
Average nighttime temperature: +17°C
Water temperature: —
Precipitation (month): 2.3 mm
Days with precipitation: 1
Humidity: 72%
Wind: 5 m/s

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

September	Day	Night	Sea t°	Wind	Precip	Humidity
1Fri	+23°C	+17°C	—	5-6 m/s, NNW	0 mm	83%
2Sat	+21°C	+16°C	—	4-5 m/s, NNW	0.3 mm	79%
3Sun	+22°C	+16°C	—	3 m/s, ENE	0.1 mm	74%
4Mon	+22°C	+17°C	—	6-8 m/s, SSE	2 mm	80%
5Tue	+22°C	+18°C	—	5-6 m/s, SSE	1.1 mm	86%
6Wed	+22°C	+18°C	—	3-5 m/s, S	0 mm	82%
7Thu	+23°C	+18°C	—	4-6 m/s, S	0.2 mm	82%
8Fri	+24°C	+19°C	—	4-6 m/s, S	0.5 mm	86%
9Sat	+23°C	+18°C	—	3-5 m/s, SSW	0.3 mm	84%
10Sun	+22°C	+18°C	—	3-4 m/s, SSW	0.9 mm	84%
11Mon	+22°C	+18°C	—	2-4 m/s, WSW	0 mm	80%
12Tue	+23°C	+18°C	—	3-4 m/s, WNW	0.5 mm	80%
13Wed	+25°C	+18°C	—	4-6 m/s, NNW	0.2 mm	78%
14Thu	+26°C	+19°C	—	4-5 m/s, NNW	0 mm	74%
15Fri	+24°C	+19°C	—	4 m/s, NW	0.1 mm	81%
16Sat	+22°C	+18°C	—	4-5 m/s, SW	2.8 mm	80%
17Sun	+21°C	+18°C	—	7-9 m/s, SSW	1.1 mm	78%
18Mon	+23°C	+17°C	—	3 m/s, WSW	0 mm	75%
19Tue	+23°C	+17°C	—	3-5 m/s, NNW	0 mm	71%
20Wed	+22°C	+17°C	—	3-4 m/s, WSW	0 mm	78%
21Thu	+21°C	+18°C	—	6-7 m/s, NNW	3 mm	82%
22Fri	+22°C	+17°C	—	4-5 m/s, NNW	0 mm	68%
23Sat	+23°C	+16°C	—	4-5 m/s, N	0 mm	68%
24Sun	+25°C	+17°C	—	3-5 m/s, WNW	0 mm	60%
25Mon	+26°C	+18°C	—	4-5 m/s, NNW	0 mm	65%
26Tue	+25°C	+18°C	—	5 m/s, N	0 mm	80%
27Wed	+25°C	+18°C	—	4-5 m/s, NNW	0 mm	70%
28Thu	+25°C	+18°C	—	4-6 m/s, NNW	0 mm	73%
29Fri	+28°C	+19°C	—	4-5 m/s, N	0 mm	73%
30Sat	+28°C	+21°C	—	3 m/s, S	0 mm	61%

Weather highs and lows in Sintra for september

Warmest day: 29 september, +28°C
Coldest night: 2 september, +16°C
Max precipitation: 21 september, 3 mm
Warmest water: —
Coldest water: —

Climate in Sintra in september

Year: 2023
Average daytime temperature: +23°C
Average nighttime temperature: +18°C
Water temperature: —
Precipitation (month): 13.1 mm
Days with precipitation: 5
Humidity: 77%
Wind: 4 m/s

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

September	Day	Night	Sea t°	Wind	Precip	Humidity
1Thu	+24°C	+17°C	—	4-5 m/s, NW	0 mm	84%
2Fri	+23°C	+17°C	—	4-5 m/s, NW	0 mm	82%
3Sat	+23°C	+17°C	—	4-5 m/s, NW	0 mm	80%
4Sun	+23°C	+17°C	—	3-4 m/s, SW	0 mm	81%
5Mon	+24°C	+18°C	—	3-4 m/s, WSW	0.4 mm	84%
6Tue	+23°C	+18°C	—	3-4 m/s, W	0 mm	83%
7Wed	+23°C	+17°C	—	3-4 m/s, WNW	0 mm	76%
8Thu	+24°C	+19°C	—	3 m/s, W	0.2 mm	84%
9Fri	+25°C	+19°C	—	3-4 m/s, NW	0 mm	83%
10Sat	+26°C	+19°C	—	3-4 m/s, WNW	0 mm	78%
11Sun	+25°C	+19°C	—	3-5 m/s, SSW	0 mm	86%
12Mon	+23°C	+19°C	—	8-10 m/s, SSE	4.7 mm	90%
13Tue	+22°C	+19°C	—	7-8 m/s, SSW	3.4 mm	87%
14Wed	+22°C	+19°C	—	5-6 m/s, SW	2.7 mm	86%
15Thu	+22°C	+19°C	—	3-4 m/s, SW	0 mm	83%
16Fri	+23°C	+18°C	—	2-5 m/s, WNW	0.1 mm	80%
17Sat	+25°C	+18°C	—	4-5 m/s, NW	0 mm	79%
18Sun	+25°C	+20°C	—	3-4 m/s, WSW	0 mm	70%
19Mon	+28°C	+19°C	—	3-4 m/s, WSW	0.9 mm	66%
20Tue	+24°C	+20°C	—	2-3 m/s, W	0.5 mm	79%
21Wed	+25°C	+19°C	—	3-4 m/s, WNW	0.2 mm	77%
22Thu	+25°C	+18°C	—	3-4 m/s, WNW	0 mm	78%
23Fri	+23°C	+18°C	—	3-6 m/s, NW	0 mm	79%
24Sat	+22°C	+18°C	—	8-9 m/s, NNW	0 mm	68%
25Sun	+21°C	+16°C	—	8-9 m/s, N	0 mm	64%
26Mon	+23°C	+16°C	—	6-8 m/s, N	0 mm	58%
27Tue	+23°C	+16°C	—	7-8 m/s, N	0 mm	72%
28Wed	+20°C	+17°C	—	7-9 m/s, NNW	0 mm	79%
29Thu	+20°C	+16°C	—	6-7 m/s, NNW	1.1 mm	76%
30Fri	+21°C	+15°C	—	6-7 m/s, N	0 mm	72%

Weather highs and lows in Sintra for september

Warmest day: 19 september, +28°C
Coldest night: 30 september, +15°C
Max precipitation: 12 september, 4.7 mm
Warmest water: —
Coldest water: —

Climate in Sintra in september

Year: 2022
Average daytime temperature: +23°C
Average nighttime temperature: +18°C
Water temperature: —
Precipitation (month): 14.2 mm
Days with precipitation: 4
Humidity: 78%
Wind: 4 m/s

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

September	Day	Night	Sea t°	Wind	Precip	Humidity
1Wed	+24°C	+18°C	—	3-5 m/s, NNW	0.7 mm	80%
2Thu	+24°C	+18°C	—	3-5 m/s, WNW	0.1 mm	77%
3Fri	+25°C	+18°C	—	4-6 m/s, NNW	0 mm	81%
4Sat	+25°C	+17°C	—	4-5 m/s, NW	0 mm	75%
5Sun	+26°C	+17°C	—	3-4 m/s, S	0 mm	59%
6Mon	+25°C	+20°C	—	4-6 m/s, S	0 mm	75%
7Tue	+25°C	+19°C	—	5-6 m/s, SSW	0.7 mm	87%
8Wed	+24°C	+19°C	—	4 m/s, SW	0.1 mm	86%
9Thu	+24°C	+20°C	—	3-4 m/s, NW	0 mm	73%
10Fri	+23°C	+19°C	—	3-4 m/s, WNW	0 mm	79%
11Sat	+24°C	+19°C	—	2-3 m/s, S	0.1 mm	70%
12Sun	+26°C	+19°C	—	4-5 m/s, S	0 mm	83%
13Mon	+23°C	+19°C	—	5-6 m/s, S	3.1 mm	78%
14Tue	+21°C	+18°C	—	3-4 m/s, S	3.4 mm	77%
15Wed	+23°C	+18°C	—	3-6 m/s, NW	0.4 mm	76%
16Thu	+24°C	+19°C	—	5-7 m/s, NNW	0 mm	81%
17Fri	+24°C	+18°C	—	6-7 m/s, NNW	0 mm	77%
18Sat	+23°C	+17°C	—	7-9 m/s, N	0 mm	66%
19Sun	+23°C	+17°C	—	8-9 m/s, N	0 mm	68%
20Mon	+23°C	+17°C	—	8 m/s, N	0 mm	71%
21Tue	+25°C	+17°C	—	6 m/s, NE	0 mm	51%
22Wed	+25°C	+17°C	—	4-6 m/s, NNE	0 mm	50%
23Thu	+22°C	+15°C	—	4-5 m/s, N	0.2 mm	67%
24Fri	+21°C	+15°C	—	2-4 m/s, SW	0.7 mm	76%
25Sat	+21°C	+17°C	—	4-5 m/s, WSW	0.2 mm	82%
26Sun	+22°C	+16°C	—	2 m/s, WSW	0 mm	79%
27Mon	+24°C	+16°C	—	3-5 m/s, NNW	0 mm	78%
28Tue	+21°C	+17°C	—	7-8 m/s, N	0 mm	70%
29Wed	+23°C	+16°C	—	8 m/s, N	0 mm	68%
30Thu	+24°C	+16°C	—	6-7 m/s, N	0 mm	75%

Weather highs and lows in Sintra for september

Warmest day: 5 september, +26°C
Coldest night: 23 september, +15°C
Max precipitation: 14 september, 3.4 mm
Warmest water: —
Coldest water: —

Climate in Sintra in september

Year: 2021
Average daytime temperature: +24°C
Average nighttime temperature: +18°C
Water temperature: —
Precipitation (month): 9.7 mm
Days with precipitation: 2
Humidity: 74%
Wind: 4 m/s

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

September	Day	Night	Sea t°	Wind	Precip	Humidity
1Tue	+23°C	+17°C	—	7-8 m/s, NNW	0 mm	68%
2Wed	+26°C	+17°C	—	5-6 m/s, N	0 mm	71%
3Thu	+28°C	+19°C	—	3-6 m/s, WSW	0 mm	52%
4Fri	+27°C	+19°C	—	4-6 m/s, NNW	0 mm	48%
5Sat	+26°C	+17°C	—	5-6 m/s, NNW	0 mm	66%
6Sun	+27°C	+19°C	—	3-5 m/s, NNW	0 mm	62%
7Mon	+27°C	+20°C	—	3-4 m/s, NW	0 mm	61%
8Tue	+29°C	+19°C	—	3-4 m/s, E	0 mm	50%
9Wed	+25°C	+19°C	—	3-4 m/s, SSW	0 mm	68%
10Thu	+26°C	+18°C	—	2-4 m/s, W	0 mm	55%
11Fri	+25°C	+18°C	—	2-3 m/s, WNW	0 mm	54%
12Sat	+26°C	+19°C	—	2 m/s, S	0 mm	56%
13Sun	+26°C	+19°C	—	4-8 m/s, S	0 mm	64%
14Mon	+23°C	+17°C	—	3-5 m/s, SSW	0 mm	82%
15Tue	+22°C	+19°C	—	4-5 m/s, S	0 mm	85%
16Wed	+23°C	+18°C	—	3-4 m/s, SSW	0 mm	82%
17Thu	+21°C	+18°C	—	4-7 m/s, S	2.2 mm	84%
18Fri	+20°C	+18°C	—	7-9 m/s, SSE	2.7 mm	82%
19Sat	+22°C	+18°C	—	4-5 m/s, SSW	1 mm	82%
20Sun	+22°C	+18°C	—	3-5 m/s, SSW	0.1 mm	85%
21Mon	+22°C	+17°C	—	2-3 m/s, W	0 mm	79%
22Tue	+23°C	+18°C	—	2-4 m/s, SW	0.3 mm	82%
23Wed	+22°C	+19°C	—	3-5 m/s, SW	0.6 mm	84%
24Thu	+21°C	+17°C	—	3-6 m/s, NW	0 mm	80%
25Fri	+20°C	+16°C	—	7-8 m/s, N	0 mm	68%
26Sat	+21°C	+16°C	—	8-9 m/s, N	0 mm	66%
27Sun	+21°C	+17°C	—	7-8 m/s, NNW	0 mm	76%
28Mon	+22°C	+16°C	—	5-7 m/s, N	0 mm	70%
29Tue	+23°C	+16°C	—	5-7 m/s, N	0 mm	71%
30Wed	+20°C	+17°C	—	7-8 m/s, NNW	0 mm	78%

Weather highs and lows in Sintra for september

Warmest day: 8 september, +29°C
Coldest night: 25 september, +16°C
Max precipitation: 18 september, 2.7 mm
Warmest water: —
Coldest water: —

Climate in Sintra in september

Year: 2020
Average daytime temperature: +24°C
Average nighttime temperature: +18°C
Water temperature: —
Precipitation (month): 6.9 mm
Days with precipitation: 3
Humidity: 70%
Wind: 4 m/s

Weather in Sintra in september by year

Year	Day	Night	Precipitation	Days with precipitation	Water
2025	+23°C	+17°C	1.4 mm	0	—
2024	+23°C	+17°C	2.3 mm	1	—
2023	+23°C	+18°C	13.1 mm	5	—
2022	+23°C	+18°C	14.2 mm	4	—
2021	+24°C	+18°C	9.7 mm	2	—
2020	+24°C	+18°C	6.9 mm	3	—

Comparison september in Sintra with other months

Month	Day	Night	Days with precipitation	Sunny days
January	+15°C	+10°C	5	13
February	+16°C	+11°C	4	12
March	+17°C	+11°C	5	11
April	+18°C	+13°C	5	10
May	+21°C	+14°C	2	18
June	+23°C	+16°C	1	18
July	+25°C	+18°C	0	26
August	+25°C	+18°C	0	26
September	+23°C	+18°C	3	18
October	+22°C	+17°C	5	14
November	+18°C	+14°C	4	12
December	+16°C	+12°C	6	10