Great Blue Hole weather: choose a season, keep a buffer
Great Blue Hole weather planning starts with a distinction between climate and the conditions on your travel day. February to April are relatively drier in the international-airport climate record. That helps frame your arrival plans; the offshore boat journey also depends on wind and sea conditions. The Great Blue Hole lies in Lighthouse Reef, away from the station used for the table on this page.
Choose a broad travel window, then leave room for the operator's weather decision. See the Great Blue Hole activity comparison to separate snorkeling, diving and the editorial overview of scenic flights. Your overnight base and arrival connections should give you room to respond if the planned offshore day moves.
February to April: less rain, with sea conditions still to consider
The airport's monthly averages make February, March and April a useful starting point if lower rainfall is your priority. March has the smallest average rainfall total in that series. These are historical averages for land near your arrival route. A drier month does not settle the wind, waves or conditions at the offshore reef on any particular morning.
Plan a boat day with the crossing in mind as well as the time in the water. Published programmes describe about 2.5 hours from San Pedro, about two hours from Caye Caulker and about 2.5 hours each way from Belize City. These are estimates from different programmes. Leave the return flexible rather than connecting it directly to an international departure or another fixed appointment.
Our pick: a snorkeling day
This snorkeling trip from San Pedro is an offshore option to consider when the weather and sea conditions permit.
Hand-picked tours, booked through Viator. Prices are indicative starting prices in US dollars (as of November 2026). Tap a tour for live availability and the current price in your currency.
A weather-dependent snorkeling day
The snorkeling option leaves from San Pedro for a full offshore day. Choose it around the marine outlook and the product's individual age and participation conditions.
Climate table: international-airport max, min and rainfall
The National Meteorological Service of Belize gives these climate normals for Philip S. W. Goldson International Airport in Ladyville, for 1991 to 2020, checked on 11 November 2026. They provide coastal and arrival context, not measurements at the Great Blue Hole or a forecast for Lighthouse Reef. Max and min are monthly averages of daily air-temperature highs and lows; rainfall is the average monthly total.
| Month | Max °C | Min °C | Rainfall mm |
|---|---|---|---|
| January | 27.9 | 20.6 | 141.4 |
| February | 28.8 | 21.5 | 64.7 |
| March | 29.8 | 22.4 | 41.0 |
| April | 31.2 | 24.2 | 58.0 |
| May | 31.9 | 25.2 | 131.8 |
| June | 31.7 | 25.7 | 236.4 |
| July | 31.5 | 25.3 | 180.2 |
| August | 31.8 | 25.3 | 195.0 |
| September | 31.8 | 24.9 | 229.8 |
| October | 30.6 | 23.9 | 305.5 |
| November | 29.2 | 22.0 | 235.8 |
| December | 28.3 | 21.2 | 150.9 |
Read each rainfall entry as a monthly average; actual rainfall varies from day to day. The air-temperature columns describe the airport station. Use the table for the broad shape of your travel plans and current marine information for decisions about an offshore visit.
Rainy season and hurricane season: 1 June to 30 November
The Belize weather service describes June to November as the rainy season. The official Atlantic hurricane season also runs from 1 June to 30 November. These are seasonal planning contexts, not a blanket annual closure of the Great Blue Hole. The climate summary identifies September and October as a focus for tropical storms and hurricanes; that does not provide a daily operating calendar.
Keep seasonal planning separate from the decision to sail. A rainy-season date alone does not tell you whether a particular excursion will run, and being outside hurricane season does not promise suitable marine conditions. Follow the operator's instructions and current notices relevant to your travel day.
Cold fronts and sea conditions
Cold fronts affect Belize from October to April, particularly December and January. This is another reason to avoid treating the drier part of the year as a calm-sea guarantee. The Belize weather service provides a marine forecast; use current information alongside the executing team's assessment. A photograph of storm clouds illustrates weather, rather than reporting a warning for your date.
Weather buffers and moving a boat trip or scenic flight
Put the offshore excursion before your last available day when your itinerary allows. Published operator practice includes checking the forecast the evening before and postponing or cancelling when conditions require it. Scenic flights are weather dependent too. Keep contact details accessible and ask how a changed departure fits your remaining stay before adding tightly timed onward transport.
The snorkeling option here starts at the San Pedro dock reached via Caribena Street and is listed as 12 hours in the product information dated 11 November 2026. That is the whole excursion duration. Snorkeling is a surface experience, with age and participation rules specific to the chosen product. Settle those conditions before booking; a climate recommendation is not a participation clearance. Animal encounters vary and should not be the condition on which you judge the day.
Weather questions
Which months have lower rainfall in the table?
February to April are relatively drier at the international-airport station. The figures describe a historical coastal record, not calm-water probabilities at the reef.
Does hurricane season mean the site closes for those months?
The seasonal dates are a weather-planning framework. Follow the actual excursion decision and current relevant notices for your date.
Can I rely on a scenic flight if the boat is postponed?
A scenic flight has its own weather decision and availability. Keep flexibility for either activity rather than treating one as a guaranteed replacement.