Guanacaste weather in April
Guanacaste averages 34°C by day and 26°C at night in April, with the sea at 30°C and about 70 mm of rain in the month. It cools by about 3°C into May.
Day
34°C
Night
26°C
Sea
30°C
Rain
70 mm
Flight from London
11h
What April feels like
April is hot in Guanacaste: proper beach weather.
The sea is warm at 30°C: comfortable for long swims.
Rain is occasional: about 70 mm in the month.
That is 19°C warmer than an average April day in London.
Of the 56 sun destinations we track, Guanacaste is the #3 warmest in April.
Guanacaste weather by month
April is highlighted. Compare with March and May, or see the full year in Guanacaste.
| Month | Day | Night | Sea | Rain |
|---|---|---|---|---|
| January | 32°C | 25°C | 28°C | 14 mm |
| February | 34°C | 25°C | 28°C | 6 mm |
| March | 34°C | 25°C | 29°C | 15 mm |
| April | 34°C | 26°C | 30°C | 70 mm |
| May | 31°C | 25°C | 30°C | 267 mm |
| June | 29°C | 24°C | 30°C | 379 mm |
| July | 30°C | 25°C | 30°C | 240 mm |
| August | 30°C | 24°C | 30°C | 295 mm |
| September | 29°C | 24°C | 30°C | 346 mm |
| October | 29°C | 24°C | 29°C | 502 mm |
| November | 29°C | 24°C | 28°C | 214 mm |
| December | 31°C | 24°C | 29°C | 37 mm |
Guanacaste in April: quick answers
Is Guanacaste hot in April?
April is hot in Guanacaste: proper beach weather. Average highs are 34°C and lows 26°C.
Can you swim in Guanacaste in April?
The sea is warm at 30°C: comfortable for long swims.
Does it rain in Guanacaste in April?
Rain is occasional: about 70 mm in the month.
What is the warmest month in Guanacaste?
March, at an average high of 34°C. The coolest is October at 29°C.
How long is the flight to Guanacaste from the UK?
About 11h direct from London, estimated from the 8,795 km distance. Check your airline for exact times.
Still choosing? See where is hot in April for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in April from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. Rain is the average monthly total. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Guanacaste in April?
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