Sand Key Water Temperature & Swim Forecast
Popular Florida Gulf beach near Clearwater.
Live conditions loading.
Location
Sand Key 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 Sand Key's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.
Sand Key swimming conditions summary
- Water temperature
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- Water feels
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- Swimmable today
- Loading live reading
- 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
- June, July, August
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 Sand Key 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 Sand Key next week?
Based on long-term August averages and the latest marine model, expect the sea around Sand Key to sit close to 30.0°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 Sand Key?
June – July – August are typically the warmest months to swim at Sand Key, with sea temperatures at their seasonal peak.
Can I swim at Sand Key today?
Live data is loading. In summer, this beach typically offers comfortable swimming conditions.
- • Located in Florida Gulf, United States (Gulf of Mexico).
- • 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 Sand Key
The sea in Sand Key peaks in July, when the water averages around 30°C.
The main swimming season runs from March – December, when surface temperatures stay comfortable for extended sessions.
On average, 10 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
Shoulder months like February and January are noticeably cooler but often quieter, with fewer crowds and steadier weather.
The coldest month is typically January at around 19°C, when cold-water swimmers dominate the coast.
Sand Key sea temperature history
Long-term climatology for Sand Key shows an annual mean sea temperature of 25°C, ranging from 19°C in winter to 30°C at the summer peak.
The seasonal swing is roughly 11°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 Sand Key, 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.
Sand Key sea temperature: frequently asked questions
What is the warmest month to swim in Sand Key?
July is the warmest month in Sand Key, when the sea averages about 30°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Sand Key?
The coldest month in Sand Key is typically January, when the water averages around 19°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Sand Key without a wetsuit?
The main swimming season in Sand Key runs from March – December — about 10 months a year when the sea sits above 20°C, the level most swimmers describe as pleasant without a wetsuit.
Do I need a wetsuit in Sand Key?
Outside peak summer the water in Sand Key drops toward 21°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 Sand Key?
The long-term annual mean sea temperature in Sand Key is about 25°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Sand Key?
The live reading at the top of this page shows the current sea temperature in Sand Key, 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
Best swim months: Mar – Apr – May – Jun – Jul – Aug – Sep – Oct – Nov – Dec
| Month | Sea | Comfort |
|---|---|---|
| Jan | 19°C | Pleasant |
| Feb | 19°C | Pleasant |
| Mar | 21°C | Pleasant |
| Apr | 24°C | Warm |
| May | 27°C | Hot |
| Jun | 29°C | Hot |
| Jul ⭐ | 30°C | Hot |
| Aug | 30°C | Hot |
| Sep | 29°C | Hot |
| Oct | 27°C | Hot |
| Nov | 23°C | Warm |
| Dec | 20°C | Pleasant |
Nearby beaches
The closest coastline, with live water temperatures.