September · Belize
Best time to visit Great Blue Hole in September Weather, crowds & prices
Weather in Great Blue Hole in September
Average temperature 30°C, 184 mm of rain, about 25 days with 6+ hours of sunshine and 80% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.1/10
Ranked #6 of 12 months
- Avg temp
- 30°C
- Rainfall
- 184 mm
- Humidity
- 80%
- Days with 6h+ sun
- 25
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Great Blue Hole scores 7.1/10 for beach and coastal travel - an above-average month (#6 of 12). Expect around 30°C, 184 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
The Great Blue Hole is a circular ocean sinkhole for advanced divers-sapphire depths off Lighthouse Reef. Best window: the drier months outside peak monsoon.
September in Great Blue Hole: strong conditions, 6th of 12
Days in September average 30°C (85°F) and humidity near 80% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
184 mm of rain makes this a wet month here, though with about 25 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.1/10 on the same scale — 6th of 12 months, versus 9.5/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Expect low-season pricing, and crowds are light for this destination. That combination — decent conditions at the lowest rates of the year — is the best value window on this page.
If your dates are flexible, April is materially better in Great Blue Hole — 2.4 points higher on the same scale.
Frequently asked
- What is the weather like in Great Blue Hole in September?
- In September, Great Blue Hole averages 30°C, 184 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 7.1/10.
- Is September a good time to visit Great Blue Hole?
- September earns a 7.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Great Blue Hole in September?
- Expect about 184 mm of rain in September. Average humidity is 80% and there are about 25 days with 6+ hours of sunshine.
Curated in Great Blue Hole
Tickets & experiences
Things to do in Great Blue Hole
Great Blue Hole, Belize. Live activities and tours from GetYourGuide, matched to this destination.