Boulogne-sur-Mer Sea Temperature Today: 30-Day Water Forecast
The sea temperature in Boulogne-sur-Mer today is +18°C. Over the next 30 days, the water temperature is expected to stay between +18°C and +21°C. The water is cool, so short swims are more realistic than long beach sessions. For a shorter view, open the 14-day sea temperature forecast.
Daily air temperature for the month
Day +21°C
Night +13°C
Daily sea water temperature for the month
Water +18°C
Tap a date to open detailed daily weather
| July | Day | Night | Sea t° | Wind | Precipitation | Humidity |
|---|---|---|---|---|---|---|
| 20Mon |  +21°C |  +13°C | +18°C | 6 m/s, NNE | 0.1 mm | 67% |
| 21Tue |  +21°C |  +12°C | +18°C | 5 m/s, NNE | 0.3 mm | 71% |
| 22Wed |  +22°C | +13°C | +19°C | 3 m/s, NNW | 0 mm | 77% |
| 23Thu | +22°C | +13°C | +18°C | 4 m/s, N | 0 mm | 73% |
| 24Fri | +23°C | +14°C | +19°C | 3–4 m/s, SW | 0 mm | 74% |
| 25Sat | +22°C |  +17°C | +20°C | 7 m/s, WSW | 0 mm | 79% |
| 26Sun | +21°C | +17°C | +20°C | 7–8 m/s, WSW | 0.4 mm | 84% |
| 27Mon |  +22°C | +14°C | +20°C | 6 m/s, W | 0.9 mm | 76% |
| 28Tue | +23°C | +13°C | +20°C | 6 m/s, W | 0.1 mm | 71% |
| Further values are multi-year averaged climate | ||||||
| 29Wed |  +20°C | +15°C | +20°C | 5 m/s | 0 mm | 73% |
| 30Thu | +21°C | +15°C | +20°C | 5 m/s | 0.3 mm | 76% |
| 31Fri |  +22°C | +17°C | +21°C | 6 m/s | 0.8 mm | 82% |
| 1Sat | +20°C | +16°C | +21°C | 5 m/s | 1 mm | 83% |
| 2Sun | +19°C | +15°C | +21°C | 6 m/s | 0.7 mm | 81% |
| 3Mon | +20°C | +16°C | +21°C | 5 m/s | 0.8 mm | 81% |
| 4Tue | +19°C | +15°C | +21°C | 4 m/s | 0 mm | 75% |
| 5Wed | +20°C | +14°C | +21°C | 5 m/s | 0.7 mm | 73% |
| 6Thu | +20°C | +15°C | +21°C | 5 m/s | 1.1 mm | 70% |
| 7Fri | +21°C | +15°C | +21°C | 5 m/s | 0.9 mm | 71% |
| 8Sat | +22°C | +16°C | +21°C | 6 m/s | 0.1 mm | 75% |
| 9Sun | +21°C | +17°C | +20°C | 5 m/s | 0.4 mm | 76% |
| 10Mon | +23°C | +17°C | +20°C | 5 m/s | 0 mm | 74% |
| 11Tue | +25°C | +18°C | +20°C | 4 m/s | 0 mm | 69% |
| 12Wed | +26°C | +19°C | +20°C | 4 m/s | 0.7 mm | 69% |
| 13Thu | +23°C | +18°C | +21°C | 4 m/s | 0 mm | 75% |
| 14Fri | +22°C | +17°C | +21°C | 4 m/s | 0.6 mm | 74% |
| 15Sat | +21°C |  +17°C | +21°C | 4 m/s | 0.1 mm | 81% |
| 16Sun | +21°C | +16°C | +20°C | 5 m/s | 0.7 mm | 80% |
| 17Mon | +20°C | +16°C | +20°C | 4 m/s | 0.1 mm | 76% |
| 18Tue | +21°C | +16°C | +20°C | 5 m/s | 0.1 mm | 79% |
| 19Wed | +21°C | +16°C | +21°C | 5 m/s | 0.4 mm | 80% |
Sea water temperature by months
Water +21°C
Day and night air temperature
Day +20°C
Night +15°C
Weather minimums and maximums in Boulogne-sur-Mer for a month
- Warmest day: 12 August, +26°C
- Coldest night: 21 July, +12°C
- Days with precipitation in a month: 25
- Precipitation for a month: 11.4 mm
- Rainiest day in a month: 6 August
- Maximum precipitation amount: 6 August 1.1 mm
- Highest sea water temperature: 1 August, +21°C
- Lowest sea water temperature: 20 July, +18°C