SnorkelForecast Field Atlas / Seasonal planning
Best Places to Snorkel in April
Where to snorkel in April: compare historical wave, wind, calm-water and temperature evidence at monitored destinations worldwide.
April brings spring to northern temperate coasts and autumn to southern ones. Tropical wet-season boundaries do not follow hemisphere labels.
Original comparable model evidence
April conditions by destination
These locations have a full year of comparable model observations. The table uses April data only, not the annual average; it is not a complete ranking of all the world’s reefs. Importantly, the model averages nighttime hours scored zero, so even a top place can have a modest score. This is not a percentage of safe snorkeling time.
- Destinations compared
- 11
- Countries represented
- 5
- Observed month
- Apr 2026
| Destination | Model score /100 · night included | Calm sampled hours | Sea temperature | Hemisphere |
|---|---|---|---|---|
| 01 Cozumel Mexico · Water temperature history | 30.5 | 47%46% calm mornings | 27.6°C | Northern |
| 02 Mallorca Spain · Water temperature history | 29.2 | 73%71% calm mornings | 16.7°C | Northern |
| 03 Key Largo USA · Water temperature history | 27.6 | 45%51% calm mornings | 25.8°C | Northern |
| 04 Maui USA · Water temperature history | 27.3 | 57%57% calm mornings | 25.3°C | Northern |
| 05 Bahia Honda USA · Water temperature history | 26.4 | 38%41% calm mornings | 26.2°C | Northern |
| 06 Roatán Honduras · Water temperature history | 25.7 | 25%25% calm mornings | 27.8°C | Northern |
| 07 Looe Key USA · Water temperature history | 24.7 | 38%40% calm mornings | 26.3°C | Northern |
| 08 Kauai USA · Water temperature history | 24.5 | 0%0% calm mornings | 25.2°C | Northern |
| 09 Dry Tortugas USA · Water temperature history | 24.4 | 28%29% calm mornings | 25.5°C | Northern |
| 10 Oahu USA · Water temperature history | 21.8 | 0%0% calm mornings | 25.1°C | Northern |
| 11 Kralendijk Bonaire · Water temperature history | 15.8 | 5%3% calm mornings | 27.0°C | Northern |
South of the equator
Southern Hemisphere destinations
March to May moves from late summer into autumn south of the equator. Sea temperatures, swell and wet seasons vary greatly by latitude.
No qualifying southern locations in the current comparable cohort; this is not a finding that southern snorkeling is worse.
Southern locations to investigate · unranked
These existing forecast destinations do not have comparable monthly scores yet and are not recommendations for this month.
- Jervis BayTemperate New South Wales shore snorkeling; check exposure, swell and rainfall.
- Ningaloo ReefWestern Australian fringing reef; safe access and tide windows vary by site.
- Great Barrier ReefQueensland tropical reefs; summer overlaps marine-stinger, wet and cyclone seasons.
- Goat Island Marine ReserveNew Zealand temperate-water reserve; local water temperature and swell matter.
North of the equator
Northern Hemisphere destinations
March to May brings a transition from winter to spring north of the equator. Winter swell and unsettled weather can persist at some popular coastlines.
How to use this comparison
Historical, not a live forecast
The sampled month is part of the 1 Oct 2025–30 Sep 2026 historical window. Models are not underwater observations or predictions for next year. Follow each location report for the current forecast.
Coverage before ranking
Each listed destination meets a 12-month coverage check with at least 20 qualified days per month and 18 hourly samples per day. No partial-year comparisons or mixed scoring profiles.
What 25/100 means
The all-hours Snorkel Score includes night hours scored zero. A 25/100 score does not mean a reef is poor or 25% of hours are safe. Calm-share is a wind-and-wave threshold, also not a safety guarantee. Visibility, shorebreak and hazardous currents require local checks.
Underlying data: Open-Meteo Marine API and historical weather. View the annual comparison. Commercial listings never affect the order.