SnorkelForecast Field Atlas / Seasonal planning

Best Places to Snorkel in August

Where to snorkel in August: compare historical wave, wind, calm-water and temperature evidence at monitored destinations worldwide.

August is late northern summer and southern winter. Check regional swell, heat, tropical storms and local beach access rather than relying on the calendar.

Choose the coast and the day, not just the month. Summer does not guarantee calm water. Historical model scores reflect conditions at monitored model points—not reef quality, underwater visibility, wildlife or clearance to enter the sea.

Original comparable model evidence

August conditions by destination

These locations have a full year of comparable model observations. The table uses August 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
Aug 2026
MODEL #01 / 11 MONITORED Mallorca Spain 75% calm sampled hours · 29.7°C sea MODEL #02 / 11 MONITORED Cozumel Mexico 81% calm sampled hours · 29.7°C sea MODEL #03 / 11 MONITORED Key Largo USA 85% calm sampled hours · 31.6°C sea
Comparable August marine model conditions. More points means more favorable modelled conditions, not a safety rating.
Destination Model score /100 · night included Calm sampled hours Sea temperature Hemisphere
01 Mallorca Spain · Water temperature history 36.6 75%77% calm mornings 29.7°C Northern
02 Cozumel Mexico · Water temperature history 32.6 81%80% calm mornings 29.7°C Northern
03 Key Largo USA · Water temperature history 31.6 85%83% calm mornings 31.6°C Northern
04 Bahia Honda USA · Water temperature history 29.7 64%61% calm mornings 31.4°C Northern
05 Looe Key USA · Water temperature history 29.0 61%62% calm mornings 31.2°C Northern
06 Dry Tortugas USA · Water temperature history 28.9 69%63% calm mornings 31.4°C Northern
07 Maui USA · Water temperature history 24.7 22%21% calm mornings 27.5°C Northern
08 Kauai USA · Water temperature history 24.2 0%0% calm mornings 27.6°C Northern
09 Oahu USA · Water temperature history 20.6 0%0% calm mornings 27.2°C Northern
10 Roatán Honduras · Water temperature history 20.3 9%14% calm mornings 29.0°C Northern
11 Kralendijk Bonaire · Water temperature history 14.8 0%0% calm mornings 28.8°C Northern

South of the equator

Southern Hemisphere destinations

June to August is Southern Hemisphere winter. Some temperate snorkeling regions are cold and exposed; tropical coasts follow their own regional weather patterns.

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

June to August is Northern Hemisphere summer. Many temperate destinations become more practical, but heat, storms and local winds can still interrupt snorkeling.

  1. Mallorca37/100 · Spain
  2. Cozumel33/100 · Mexico
  3. Key Largo32/100 · USA
  4. Bahia Honda30/100 · USA
  5. Looe Key29/100 · USA
  6. Dry Tortugas29/100 · USA

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.