Month-specific sea-surface temperature · Honduras

Roatán Sea Temperature in May

28.7°C

83.7°F

In May, sea-surface temperature near Roatán has a historical monthly average of 28.7°C. This is not the reading for any particular holiday date.

Across 2023–2025, the lowest and highest yearly May monthly means were 28.5–28.9°C. These are not daily extremes.

Previous month

April · 27.8°C

Change into May: +0.9°C

Next month

June · 29.1°C

Change into next month: +0.4°C

Can you swim or snorkel in Roatán in May?

At 28.7°C our temperature-only guide describes the water as very warm water. Comfort depends on your cold tolerance, immersion time and wind. A historical average cannot determine whether conditions are safe on any given day.

Do you need a wetsuit?

Swimwear is usually enough; a rash guard adds sun protection.

Which beach should you choose?

Look for a beach sheltered from the actual forecast waves and wind on your visit. Exposure, currents and entry conditions vary even where water temperatures are similar. Follow local warnings.

Check the current waves, wind and snorkeling forecast →

A live forecast does not predict a future May. Check again close to your trip.

Waves and wind: recorded-model conditions for May

These figures come from a separately modelled, date-specific wind/wave backfill, not the NOAA SST series. A single observed season is not a climatological likelihood or a guarantee of safe conditions.

Morning calm hours

Afternoon calm hours

10%

Historical coverage

May 2026

31 valid days

A “calm hour” meets fixed modelled wave/wind thresholds; neither visibility nor local currents, entry conditions or actual beach safety is measured here. Periods may differ by coast.

Nearby places in May

Comparable historical averages from independent marine grid cells. Warmer water does not imply safe snorkeling.

Utila 28.9°C

Roatán Sea Temperature: All 12 Months

Choose a month for available historical evidence, month comparisons and swim guidance. Missing history is clearly marked and never presented as a long-term normal.

January 27.4°C February 27.2°C March 27.7°C April 27.8°C May 28.7°C June 29.1°C July 28.9°C August 29.7°C September 30.3°C October 30.1°C November 28.8°C December 28.1°C

Data source and limitations

Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature; 2023–2025. Marine model grid near 16.30, -86.53. Based on 3 yearly monthly means and 2232 recorded samples. Source methodology.

Modelled sea-surface temperatures do not establish underwater visibility, wildlife, calm currents or safe entry.