Knokke-Heist Water Temperature & Swim Forecast
Belgium's chic resort beach.
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Location
Knokke-Heist on the map, with nearby beaches and live sea temperatures.
7-day forecast
Water, air, waves, wind and UV outlook for the week ahead.
Check live temperature
Live water temperature is loading — refresh in a moment for a precise recommendation.
Recommendation tuned for Knokke-Heist's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.
Knokke-Heist swimming conditions summary
- Water temperature
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- Water feels
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- Swimmable today
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- Swim conditions score
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- Wetsuit needed
- Check live temperature
- Air temperature
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- Waves
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- Wind
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- UV index
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- Warmest months to swim
- July, August, September
Live water temperature is loading — refresh in a moment for a precise recommendation. Live marine data updated hourly from Open-Meteo Marine.
Frequently asked questions
Can I swim at Knokke-Heist right now?
Live data is loading. Use the 7-day forecast above to plan your swim — conditions above 22°C are comfortable for most swimmers.
What will the sea temperature be at Knokke-Heist next week?
Based on long-term August averages and the latest marine model, expect the sea around Knokke-Heist to sit close to 19.0°C over the next 7 days. Check the live 7-day chart above for the exact daily outlook.
When is the best month to swim at Knokke-Heist?
July – August – September are typically the warmest months to swim at Knokke-Heist, with sea temperatures at their seasonal peak.
Can I swim at Knokke-Heist today?
Live data is loading. In summer, this beach typically offers comfortable swimming conditions.
- • Located in Flemish Coast, Belgium (North Sea).
- • Family friendly with calm, accessible water.
- • Live data refreshed hourly from Open-Meteo Marine.
Monthly sea temperature averages
Tap any month to see what to expect — based on regional climatology.
Best time to swim in Knokke-Heist
The sea in Knokke-Heist peaks in August, when the water averages around 19°C.
On average, 0 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
Outside peak season the water drops toward 9°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable.
The coldest month is typically February at around 7°C, when cold-water swimmers dominate the coast.
Knokke-Heist sea temperature history
Long-term climatology for Knokke-Heist shows an annual mean sea temperature of 13°C, ranging from 7°C in winter to 19°C at the summer peak.
The seasonal swing is roughly 12°C between the coldest and warmest month — a useful yardstick when comparing years or checking whether the current sea is running above or below average.
Recent decades have trended slightly warmer at Knokke-Heist, in line with regional sea-surface temperature records for the wider basin.
Monthly averages below are drawn from multi-decadal climatology and are updated as new observations arrive.
Knokke-Heist sea temperature: frequently asked questions
What is the warmest month to swim in Knokke-Heist?
August is the warmest month in Knokke-Heist, when the sea averages about 19°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Knokke-Heist?
The coldest month in Knokke-Heist is typically February, when the water averages around 7°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Knokke-Heist without a wetsuit?
The sea in Knokke-Heist rarely climbs above 20°C, so a wetsuit is recommended year-round for anything longer than a quick dip.
Do I need a wetsuit in Knokke-Heist?
Outside peak summer the water in Knokke-Heist drops toward 9°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable. In peak months most swimmers go without.
What is the average sea temperature in Knokke-Heist?
The long-term annual mean sea temperature in Knokke-Heist is about 13°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Knokke-Heist?
The live reading at the top of this page shows the current sea temperature in Knokke-Heist, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Year-round sea temperature
| Month | Sea | Comfort |
|---|---|---|
| Jan | 8°C | Cold |
| Feb | 7°C | Cold |
| Mar | 8°C | Cold |
| Apr | 10°C | Cold |
| May | 13°C | Cold |
| Jun | 16°C | Bracing |
| Jul | 18°C | Pleasant |
| Aug ⭐ | 19°C | Pleasant |
| Sep | 17°C | Bracing |
| Oct | 14°C | Bracing |
| Nov | 11°C | Cold |
| Dec | 9°C | Cold |
Nearby beaches
The closest coastline, with live water temperatures.