Climate guide for Nosy Be, Madagascar

Best Time to Visit
Nosy Be

How to read the score (0–10)
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01 · Madagascar

About Nosy Be

June-September brings calmer seas for Nosy Be beaches, Hell-Ville markets, and island hops. Snorkel mornings while water is clear; save spice tours and sunset viewpoints for breezier afternoons.

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Did you know?

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Travel Tips

01Best time & timing
The strongest months are October, July, August: October peaks at 9.9/10, while March drops to 5.7/10.
02Weather & what to pack
27°C and 23 mm of rain shape a typical October here. Pack the lightest clothing you own, a hat and more water than feels necessary.
03Crowds & value
Book early for July, the busiest stretch; May is the value window at 8.8/10.

Things to do in Nosy Be

Nosy Be, Madagascar. Live activities and tours from GetYourGuide, matched to this destination.

When to visit Nosy Be: the short answer

The best time to visit Nosy Be is October, followed by July, August. Those months combine the most usable temperatures with the fewest lost days to rain: October averages 27°C with 23 mm of rain and about 31 days with 6+ hours of sunshine. The months to avoid unless you have a specific reason are March, February. If budget matters more than perfect weather, April is the strongest of the low-rate months at 6.1/10.

Across the year Nosy Be swings from 25°C in July to 28°C in April, a 3-degree spread, while rainfall ranges from 16 mm in August to 508 mm in January. That is the whole planning problem in one sentence: Nosy Be is not equally good year-round, and the difference between the best and worst month here is 4.2 points on a 10-point scale.

Warmest month: April (28°C). Coolest: July (25°C). Driest: August (16 mm). Wettest: January (508 mm).

Nosy Be month by month

January in Nosy Be: mixed conditions, plan around the weather

Trade-offs · 5.8/10

January averages 27°C (81°F) and humidity near 83%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

508 mm makes this the wettest stretch of the year, though about 25 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.

It scores 5.8/10 here, 10th of 12 months, against 9.9/10 in the destination's best month.

Plan for low-season pricing, with crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

Flexible dates? October scores 4.1 points higher here — enough to change the trip.

February in Nosy Be — workable with trade-offs

Trade-offs · 5.8/10

February averages 27°C (81°F) and humidity near 84%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

295 mm makes this the wettest stretch of the year, though about 27 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.

It scores 5.8/10 here, 11th of 12 months, against 9.9/10 in the destination's best month.

Plan for low-season pricing, with crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

Flexible dates? October scores 4.1 points higher here — enough to change the trip.

March in Nosy Be — workable with trade-offs

Trade-offs · 5.7/10

Days in March average 27°C (81°F) and humidity near 83% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.

This is the year's wettest stretch at 384 mm, but with about 26 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.

That is 5.7/10 on the same scale — 12th of 12 months, versus 9.9/10 for the best month here.

Budget for low-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

If your dates are flexible, October is materially better in Nosy Be — 4.2 points higher on the same scale.

April in Nosy Be: mixed conditions, plan around the weather

Trade-offs · 6.1/10

April averages 28°C (82°F) and humidity near 80%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

209 mm makes this the wettest stretch of the year, though about 26 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.

It scores 6.1/10 here, 9th of 12 months, against 9.9/10 in the destination's best month.

Figure on low-season pricing, with crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

Flexible dates? October scores 3.8 points higher here — enough to change the trip.

May is one of the strongest months in Nosy Be (6th)

Best window · 8.8/10

Days in May average 27°C (81°F) and humidity near 75% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.

Budget for roughly 62 mm of rain this month — a flexible day or two helps — with about 24 days with 6+ hours of sunshine and 11.4 hours of daylight to work around it.

On our climate-comfort scale this is one of the strongest months of the year for Nosy Be at 8.8/10 (6th of 12), just behind October at 9.9/10.

Expect mid-season pricing, and crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.

June is one of the strongest months in Nosy Be (4th)

Best window · 9.7/10

June averages 26°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Expect 20 mm of rain — occasional showers rather than washed-out days — alongside about 21 days with 6+ hours of sunshine and 11.2 daylight hours.

A 9.7/10 puts this among the year's best months in Nosy Be (4th of 12); only October scores higher, at 9.9/10.

Figure on peak pricing, with crowds are moderate.

Pack light clothing, swimwear and real sun protection.

July in Nosy Be — one of the year's strongest windows (2nd)

Best window · 9.8/10

July averages 25°C (76°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.

Expect 25 mm of rain — occasional showers rather than washed-out days — alongside about 23 days with 6+ hours of sunshine and 11.3 daylight hours.

A 9.8/10 puts this among the year's best months in Nosy Be (2nd of 12); only October scores higher, at 9.9/10.

Plan for peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack light clothing, swimwear and real sun protection.

August is one of the strongest months in Nosy Be (3rd)

Best window · 9.8/10

With 25°C (76°F) on average, August delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.

With around 16 mm of rain, any showers tend to pass through rather than settle in; about 28 days with 6+ hours of sunshine and 11.6 hours of daylight fill the rest.

On our climate-comfort scale this is one of the strongest months of the year for Nosy Be at 9.8/10 (3rd of 12), just behind October at 9.9/10.

Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack light clothing, swimwear and real sun protection.

September ranks 5th of 12 for Nosy Be — one of the best windows

Best window · 9.7/10

With 25°C (78°F) on average, September delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.

With around 34 mm of rain, any showers tend to pass through rather than settle in; about 30 days with 6+ hours of sunshine and 11.9 hours of daylight fill the rest.

On our climate-comfort scale this is one of the strongest months of the year for Nosy Be at 9.7/10 (5th of 12), just behind October at 9.9/10.

Budget for peak pricing, and crowds are moderate.

Pack light clothing, swimwear and real sun protection.

October in Nosy Be — the year's strongest window

Best window · 9.9/10

October averages 27°C (80°F) and humidity near 73%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

Expect 23 mm of rain — occasional showers rather than washed-out days — alongside about 31 days with 6+ hours of sunshine and 12.3 daylight hours.

On our climate-comfort scale this is the top-ranked month of the year for Nosy Be at 9.9/10 — the reference point every other month on this page is measured against.

Figure on peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.

November holds up well in Nosy Be — 7th best month

Good · 7.7/10

November averages 28°C (82°F) and humidity near 76%, so the practical pattern is early mornings, a long midday break, and evenings back outside.

Monthly rainfall reaches 105 mm — wet for this destination — but about 30 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.

It scores 7.7/10 here, 7th of 12 months, against 9.9/10 in the destination's best month.

Plan for mid-season pricing, with crowds are moderate.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

Flexible dates? October scores 2.2 points higher here — enough to change the trip.

December in Nosy Be: mixed conditions, plan around the weather

Trade-offs · 6.3/10

Days in December average 28°C (82°F) and humidity near 79% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.

188 mm of rain makes this a wet month here, though with about 31 days with 6+ hours of sunshine there is still bright weather between the fronts.

That is 6.3/10 on the same scale — 8th of 12 months, versus 9.9/10 for the best month here.

Budget for mid-season pricing, and crowds are light for this destination.

Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.

If your dates are flexible, October is materially better in Nosy Be — 3.6 points higher on the same scale.

FAQ

Frequently asked

When is the best time to visit Nosy Be, Madagascar?
In Ideal Weather mode, the best months to visit Nosy Be are October, July, August, June, September. October is the single peak month with an Ideal Weather score of 9.9/10 based on temperature, rainfall, humidity, daylight and days with 6+ hours of sunshine.
What is the weather like in Nosy Be year-round?
Nosy Be has a climate profile suited to beach and coastal travel. Average monthly temperatures range from 25°C in July to 28°C in April, with Ideal Weather scores between 5.7 and 9.9 out of 10.
Which months should I avoid in Nosy Be?
The lowest Ideal Weather-scoring months in Nosy Be are March (5.7/10), January (5.8/10), February (5.8/10). These months typically combine less comfortable temperatures, higher rainfall or fewer days with 6+ hours of sunshine.
When is the rainy season in Nosy Be?
January is the wettest month in Nosy Be, averaging about 508 mm of rainfall. August is the driest, at roughly 16 mm.
Which is the sunniest month in Nosy Be?
October sees the most sun in Nosy Be, with about 31 days with 6+ hours of sunshine on average - ideal for outdoor plans.
Is Nosy Be a good destination for beach and coastal travel?
Nosy Be is well suited to beach and coastal travel. Its highest Ideal Weather window (October, July, August, June, September) aligns with the conditions travelers usually look for in this style of trip.
How is the bestime.to score for Nosy Be calculated?
Each month receives an Ideal Weather score from 0-10 using ERA5 climate normals for Nosy Be: temperature comfort, precipitation, humidity, daylight hours, and days with 6+ hours of sunshine - weighted for beach and coastal travel.

Climate data: Open-Meteo ERA5 historical archive, the five most recent complete years (2021–2025). Scores are monthly averages for that window, not forecasts, and short-window precipitation can differ from longer-term normals. “Sunny days” count days with at least 6 hours of measured sunshine — they are not dry days.

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Curated in Nosy Be

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