Playa Hermosa Guanacaste Water Temperature & Swim Forecast
Calm horseshoe Pacific swim bay.
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Location
Playa Hermosa Guanacaste 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 Playa Hermosa Guanacaste's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.
Playa Hermosa Guanacaste 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 Playa Hermosa Guanacaste 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 Playa Hermosa Guanacaste next week?
Based on long-term August averages and the latest marine model, expect the sea around Playa Hermosa Guanacaste to sit close to 23.0°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 Playa Hermosa Guanacaste?
July – August – September are typically the warmest months to swim at Playa Hermosa Guanacaste, with sea temperatures at their seasonal peak.
Can I swim at Playa Hermosa Guanacaste today?
Live data is loading. In summer, this beach typically offers comfortable swimming conditions.
- • Located in Guanacaste, Costa Rica (Pacific Ocean).
- • 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 Playa Hermosa Guanacaste
The sea in Playa Hermosa Guanacaste peaks in July, when the water averages around 23°C.
The main swimming season runs from January – December, when surface temperatures stay comfortable for extended sessions.
On average, 12 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
The coldest month is typically January at around 20°C, when cold-water swimmers dominate the coast.
Playa Hermosa Guanacaste sea temperature history
Long-term climatology for Playa Hermosa Guanacaste shows an annual mean sea temperature of 21°C, ranging from 20°C in winter to 23°C at the summer peak.
The seasonal swing is roughly 3°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 Playa Hermosa Guanacaste, 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.
Playa Hermosa Guanacaste sea temperature: frequently asked questions
What is the warmest month to swim in Playa Hermosa Guanacaste?
July is the warmest month in Playa Hermosa Guanacaste, when the sea averages about 23°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Playa Hermosa Guanacaste?
The coldest month in Playa Hermosa Guanacaste is typically January, when the water averages around 20°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Playa Hermosa Guanacaste without a wetsuit?
The main swimming season in Playa Hermosa Guanacaste runs from January – December — about 12 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 Playa Hermosa Guanacaste?
Outside peak summer the water in Playa Hermosa Guanacaste drops toward 20°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 Playa Hermosa Guanacaste?
The long-term annual mean sea temperature in Playa Hermosa Guanacaste is about 21°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Playa Hermosa Guanacaste?
The live reading at the top of this page shows the current sea temperature in Playa Hermosa Guanacaste, 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: Jan – Feb – Mar – Apr – May – Jun – Jul – Aug – Sep – Oct – Nov – Dec
| Month | Sea | Comfort |
|---|---|---|
| Jan | 20°C | Pleasant |
| Feb | 20°C | Pleasant |
| Mar | 20°C | Pleasant |
| Apr | 20°C | Pleasant |
| May | 21°C | Pleasant |
| Jun | 22°C | Warm |
| Jul ⭐ | 23°C | Warm |
| Aug | 23°C | Warm |
| Sep | 23°C | Warm |
| Oct | 22°C | Warm |
| Nov | 21°C | Pleasant |
| Dec | 20°C | Pleasant |
Nearby beaches
The closest coastline, with live water temperatures.