Grande-Synthe Sea Temperature Today: 30-Day Water Forecast
The sea temperature in Grande-Synthe today is +21ยฐC. Over the next 30 days, the water temperature is expected to stay around +21ยฐC. The water is usable for swimming, but it can feel cool during longer swims. For a shorter view, open the 14-day sea temperature forecast.
Daily air temperature for the month
Day +21ยฐC
Night +14ยฐC
Daily sea water temperature for the month
Water +21ยฐC
Tap a date to open detailed daily weather
| July | Day | Night | Sea tยฐ | Wind | Precipitation | Humidity |
|---|---|---|---|---|---|---|
| 21Tue |  +21ยฐC |  +14ยฐC | +21ยฐC | 4โ5 m/s, NNE | 0.2 mm | 72% |
| 22Wed |  +22ยฐC |  +15ยฐC | +21ยฐC | 4 m/s, NNW | 0.3 mm | 76% |
| 23Thu | +21ยฐC | +13ยฐC | +21ยฐC | 4โ5 m/s, N | 0.2 mm | 75% |
| 24Fri | +24ยฐC | +14ยฐC | +21ยฐC | 3โ4 m/s, W | 0 mm | 73% |
| 25Sat |  +25ยฐC | +16ยฐC | +21ยฐC | 6 m/s, WSW | 0.1 mm | 74% |
| 26Sun | +23ยฐC | +17ยฐC | +21ยฐC | 6 m/s, WSW | 0.3 mm | 80% |
| 27Mon | +23ยฐC | +15ยฐC | +21ยฐC | 5โ6 m/s, WNW | 0 mm | 72% |
| 28Tue | +24ยฐC |  +13ยฐC | +21ยฐC | 5 m/s, W | 0.8 mm | 71% |
| Further values are multi-year averaged climate | ||||||
| 29Wed | +21ยฐC | +16ยฐC | +21ยฐC | 6 m/s | 0.1 mm | 69% |
| 30Thu | +22ยฐC | +16ยฐC | +21ยฐC | 5 m/s | 0.1 mm | 74% |
| 31Fri |  +23ยฐC | +17ยฐC | +21ยฐC | 6 m/s | 0.6 mm | 79% |
| 1Sat | +21ยฐC |  +17ยฐC | +21ยฐC | 5 m/s | 0.5 mm | 81% |
| 2Sun |  +21ยฐC | +16ยฐC | +21ยฐC | 6 m/s | 0.9 mm | 77% |
| 3Mon | +21ยฐC | +16ยฐC | +21ยฐC | 6 m/s | 0.4 mm | 77% |
| 4Tue | +21ยฐC | +16ยฐC | +21ยฐC | 4 m/s | 0.1 mm | 73% |
| 5Wed | +21ยฐC | +15ยฐC | +21ยฐC | 5 m/s | 0.4 mm | 70% |
| 6Thu | +22ยฐC | +15ยฐC | +21ยฐC | 5 m/s | 0.9 mm | 67% |
| 7Fri | +22ยฐC | +16ยฐC | +21ยฐC | 5 m/s | 0.3 mm | 66% |
| 8Sat | +22ยฐC | +16ยฐC | +21ยฐC | 6 m/s | 0.3 mm | 71% |
| 9Sun | +22ยฐC | +17ยฐC | +21ยฐC | 6 m/s | 0.2 mm | 71% |
| 10Mon | +24ยฐC | +17ยฐC | +21ยฐC | 5 m/s | 0 mm | 70% |
| 11Tue | +25ยฐC | +18ยฐC | +21ยฐC | 4 m/s | 0 mm | 68% |
| 12Wed | +27ยฐC | +19ยฐC | +21ยฐC | 4 m/s | 0.1 mm | 66% |
| 13Thu | +24ยฐC | +18ยฐC | +21ยฐC | 5 m/s | 0.2 mm | 70% |
| 14Fri | +24ยฐC | +18ยฐC | +21ยฐC | 4 m/s | 0.4 mm | 69% |
| 15Sat | +23ยฐC | +18ยฐC | +21ยฐC | 4 m/s | 0.1 mm | 76% |
| 16Sun | +22ยฐC | +17ยฐC | +21ยฐC | 5 m/s | 0.5 mm | 77% |
| 17Mon | +21ยฐC | +16ยฐC | +21ยฐC | 5 m/s | 0.1 mm | 75% |
| 18Tue | +22ยฐC | +17ยฐC | +21ยฐC | 5 m/s | 0 mm | 77% |
| 19Wed | +22ยฐC | +17ยฐC | +21ยฐC | 6 m/s | 0.3 mm | 74% |
| 20Thu | +22ยฐC | +17ยฐC | +21ยฐC | 5 m/s | 0.4 mm | 73% |
Sea water temperature by months
Water +18ยฐC
Day and night air temperature
Day +21ยฐC
Night +15ยฐC
Weather minimums and maximums in Grande-Synthe for a month
- Warmest day: 12 August, +27ยฐC
- Coldest night: 28 July, +13ยฐC
- Days with precipitation in a month: 27
- Precipitation for a month: 8.8 mm
- Rainiest day in a month: 2 August
- Maximum precipitation amount: 2 August 0.9 mm
- Highest sea water temperature: 30 July, +21ยฐC
- Lowest sea water temperature: 21 July, +21ยฐC