When is the diving season in Comoros?

The diving season in Comoros runs May to December, and it is at its best August to December.

Is the diving in Comoros good for beginners?

Yes. It suits Open Water divers, so it works for a first trip after certification.

How warm is the water in Comoros?

Between 26 and 30 °C at the surface across the year, coldest in August and warmest in March. It runs cooler below the thermocline.

What wetsuit do I need in Comoros?

A 3 mm full suit covers the coldest water of the year. In the warmest months a skin or 3 mm shorty is enough.

What is the visibility like in Comoros?

Roughly 20 to 35 m depending on the month. That is estimated from satellite chlorophyll-a rather than measured in the water.

What will I see diving Comoros?

The most consistently recorded species are Humpback whale (hit-or-miss) and Green turtle (likely), from 51 records within 60 km.

Does Comoros get tropical storms?

Yes. Over 30 years of records a storm passed within 250 km in Nov–Apr, most often in January at 4 of 30 years.

Is there current in Comoros?

The tide rises and falls 3.5 m around the full and new moon, against 1.4 m in between. How much of that becomes current depends on the shape of the channel.

When should I avoid Comoros?

January is the weakest month for conditions.

How do you dive Comoros?

Mostly from day boats. Trips run through the season, May–Dec.

Comoros

Best Time to Dive in Comoros

12.26°S 43.71°E

The wildlife shows no season worth planning around, so the weather picks your month: August to December. The full season runs May to December.

Best time: Aug–Dec
Water: 26–30 °C
Visibility: 20–35 m
Season runs: May–Dec
Dived from: day boat
Tidal range: 1.4–3.5 m
Species logged: 2

Where it is

Comoros

111 km across · coastline from Natural Earth 10m

Diving in Comoros — monthly breakdown

Best months at this destination

A year of scuba diving conditions at a glance. Hover a month to isolate it.

Month by month conditions, water temperature, visibility and marine life
	January	February	March	April	May	June	July	August	September	October	November	December
Conditions	Poor	Good	Good	Moderate	Good	Moderate	Good	Excellent	Excellent	Excellent	Excellent	Excellent
Water temp (°C)	29	30	30	30	29	27	26	26	26	27	28	29
Visibility (m)	25–35	20–30	20–30	20–30	20–30	20–30	20–30	20–30	20–30	20–30	25–35	25–35
Marine life	Quiet	Steady	Quiet	Quiet	Quiet	Quiet	Quiet	Steady	Busy	Steady	Quiet	Steady
Best time								Peak	Peak	Peak	Peak	Peak

Excellent Good Moderate PoorPeak season Aug–Dec

Long-term averages, 2016–2025. Visibility is estimated from satellite chlorophyll-a. Water temperature is the surface mean; it is cooler at depth.

The Comoros diving season

1 seasons

Peak season

12 months

JFMAMJJASOND

Water temperature: 26–30 °C
Visibility: 20–30 m
Rain: 18 days a month

Diving conditionsExpect some swell. Rain is frequent topside.

Spring tides run 3.5 m against 1.4 m on neaps, so currents build around the full and new moon.
Water temperature is satellite sea-surface temperature, so expect it cooler below the thermocline.
Visibility is estimated from satellite chlorophyll-a.

Comoros water temperature and weather

51 underwater observation records · 12 surveyed years of ocean data · 10 years of sea temperature

Water & weather

Comoros water temperature by month

The dashed line is the monthly average. Eight days in ten fall inside the band.

10th to 90th percentile rangemonthly mean

rough days a month

Seas top 1.5 m on 15% of days. Enough to cancel a day boat

blowy days a month

Gusts over 40 km/h, about where a day boat stays in port

wet days a month

2 of them bring heavy rain

Monthly sea state, wind, rain, air temperature and daylight
Month	Swell	Gusts over 40 km/h	Wet days	Heavy rain	Air	Daylight
January	1.9 m	0%	24	6	29 °C	12.6 h
February	1.3 m	0%	23	4	29 °C	12.4 h
March	1.3 m	0%	24	3	29 °C	12.1 h
April	1.6 m	1%	23	3	29 °C	11.7 h
May	1.8 m	0%	15	1	28 °C	11.4 h
June	2.0 m	0%	11	0	27 °C	11.3 h
July	1.7 m	0%	10	0	27 °C	11.3 h
August	1.8 m	0%	12	0	27 °C	11.6 h
September	1.4 m	0%	13	0	28 °C	11.9 h
October	1.5 m	0%	17	0	28 °C	12.3 h
November	1.0 m	0%	18	0	29 °C	12.6 h
December	1.0 m	0%	20	2	30 °C	12.7 h

Swell is the rough end of the month: nine days in ten come in under it. Sea temperature covers 10 years, waves 4.

Pick your week

48 weeks from the daily record. Darker is better, against this site's own year. Pick a month for the detail.

Conditions by week, four weeks per month

Week 1	January week 1: Moderate	February week 1: Moderate	March week 1: Moderate	April week 1: Good	May week 1: Moderate	June week 1: Good	July week 1: Excellent	August week 1: Good	September week 1: Good	October week 1: Excellent	November week 1: Excellent	December week 1: Excellent
Week 2	January week 2: Poor	February week 2: Good	March week 2: Moderate	April week 2: Moderate	May week 2: Good	June week 2: Good	July week 2: Excellent	August week 2: Excellent	September week 2: Excellent	October week 2: Excellent	November week 2: Excellent	December week 2: Excellent
Week 3	January week 3: Poor	February week 3: Moderate	March week 3: Excellent	April week 3: Moderate	May week 3: Excellent	June week 3: Moderate	July week 3: Excellent	August week 3: Excellent	September week 3: Excellent	October week 3: Excellent	November week 3: Excellent	December week 3: Good
Week 4	January week 4: Poor	February week 4: Moderate	March week 4: Excellent	April week 4: Poor	May week 4: Excellent	June week 4: Moderate	July week 4: Moderate	August week 4: Good	September week 4: Excellent	October week 4: Excellent	November week 4: Excellent	December week 4: Good

Excellent Good Moderate PoorBest week to go: second of September

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Moderate	29 °C	1.0 m	14 km/h	73%
Week 2	Poor	29 °C	1.7 m	15 km/h	74%
Week 3	Poor	29 °C	2.0 m	18 km/h	74%
Week 4	Poor	29 °C	1.9 m	16 km/h	83%

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Moderate	29 °C	1.4 m	14 km/h	84%
Week 2	Good	30 °C	1.3 m	15 km/h	79%
Week 3	Moderate	30 °C	1.3 m	13 km/h	78%
Week 4	Moderate	30 °C	1.3 m	14 km/h	79%

March, week by week

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Moderate	30 °C	1.3 m	15 km/h	74%
Week 2	Moderate	30 °C	1.3 m	14 km/h	68%
Week 3	Excellent	30 °C	1.2 m	11 km/h	76%
Week 4	Excellent	30 °C	1.2 m	11 km/h	87%

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Good	30 °C	1.2 m	12 km/h	87%
Week 2	Moderate	30 °C	1.4 m	12 km/h	81%
Week 3	Moderate	30 °C	1.7 m	13 km/h	76%
Week 4	Poor	29 °C	1.8 m	15 km/h	71%

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Moderate	29 °C	1.9 m	16 km/h	65%
Week 2	Good	29 °C	1.7 m	16 km/h	52%
Week 3	Excellent	28 °C	1.8 m	17 km/h	43%
Week 4	Excellent	28 °C	1.9 m	17 km/h	37%

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Good	28 °C	2.0 m	17 km/h	31%
Week 2	Good	28 °C	2.1 m	18 km/h	34%
Week 3	Moderate	27 °C	1.9 m	18 km/h	40%
Week 4	Moderate	27 °C	1.8 m	18 km/h	37%

July, week by week

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Excellent	27 °C	1.8 m	19 km/h	27%
Week 2	Excellent	27 °C	1.7 m	19 km/h	28%
Week 3	Excellent	26 °C	1.7 m	19 km/h	31%
Week 4	Moderate	26 °C	1.8 m	19 km/h	36%

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Good	26 °C	1.9 m	17 km/h	38%
Week 2	Excellent	26 °C	1.6 m	15 km/h	37%
Week 3	Excellent	26 °C	1.6 m	15 km/h	39%
Week 4	Good	26 °C	2.1 m	14 km/h	40%

September, week by week

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Good	26 °C	2.0 m	15 km/h	40%
Week 2	Excellent	26 °C	1.4 m	13 km/h	38%
Week 3	Excellent	26 °C	1.4 m	12 km/h	44%
Week 4	Excellent	26 °C	1.5 m	13 km/h	51%

October, week by week

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Excellent	27 °C	1.6 m	13 km/h	55%
Week 2	Excellent	27 °C	1.4 m	13 km/h	59%
Week 3	Excellent	27 °C	1.2 m	15 km/h	57%
Week 4	Excellent	27 °C	1.2 m	16 km/h	50%

November, week by week

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Excellent	28 °C	1.0 m	15 km/h	54%
Week 2	Excellent	28 °C	1.0 m	14 km/h	60%
Week 3	Excellent	28 °C	1.0 m	14 km/h	60%
Week 4	Excellent	29 °C	0.9 m	13 km/h	63%

Week	Conditions	Water	Swell	Wind	Rain chance
Week 1	Excellent	29 °C	1.0 m	13 km/h	64%
Week 2	Excellent	29 °C	1.0 m	13 km/h	67%
Week 3	Good	29 °C	1.0 m	13 km/h	69%
Week 4	Good	29 °C	1.0 m	13 km/h	65%

10 years of daily records, averaged into weeks.

Gear & storms

What to wear

Off the coldest water of each month, not the average — that is what the suit has to cope with.

Wetsuit thickness by month
	January	February	March	April	May	June	July	August	September	October	November	December
Suit	January: skin	February: skin	March: skin	April: skin	May: skin	June: 3 mm	July: 3 mm	August: 3 mm	September: 3 mm	October: 3 mm	November: skin	December: skin

Nov–Mayskin or 3 mm shorty
Jun–Oct3 mm full suit

Swell through the year

The rough end of each month — nine days in ten come in under it.

JanFebMarAprMayJunJulAugSepOctNovDec

Amber is over 1.5 m.

Tides

Daily tidal range across one lunar month.

Tropical storms

4 of the last 30 Januarys saw a tropical storm pass within 250 km. Anything has been recorded Nov–Apr.

JanFebMarAprMayJunJulAugSepOctNovDec

Share of the last 30 years with a storm that month.

NOAASea surface temperature, from OISST and MUR
ERA5Wind, waves, rain and air temperature, via Open-Meteo
OBISMarine species records within 60 km
IBTrACSTropical cyclone tracks, 1996 to 2025

Comoros marine life — what you'll see diving

51 records within 60 km

Only 51 records have been logged within 60 km. A thin record is not an empty reef.

Species	When	Observed window	Reliability	Evidence	Records
Humpback whale	Sep		Hit-or-miss	3/12	28
Green turtle	Feb, Sep		Likely	6/12	8

Peak Present

Observed window: Months with records. Peak is where most of them fall.
Reliability: Near-guaranteed in 60% of surveyed years or more
Likely 30% to 60%
Hit-or-miss under 30%
Evidence: Years it was seen, out of the years anyone surveyed.
Records: OBIS sightings within 60 km.

These are sightings people logged, not a full survey of the reef. A species missing from a month may just mean nobody recorded one.

Diving Comoros — common questions

When is the best time to dive Comoros?: The wildlife shows no season worth planning around, so the weather picks your month: August to December. The full season runs May to December.
When is the diving season in Comoros?: The diving season in Comoros runs May to December, and it is at its best August to December.
Is the diving in Comoros good for beginners?: Yes. It suits Open Water divers, so it works for a first trip after certification.
How warm is the water in Comoros?: Between 26 and 30 °C at the surface across the year, coldest in August and warmest in March. It runs cooler below the thermocline.
What wetsuit do I need in Comoros?: A 3 mm full suit covers the coldest water of the year. In the warmest months a skin or 3 mm shorty is enough.
What is the visibility like in Comoros?: Roughly 20 to 35 m depending on the month. That is estimated from satellite chlorophyll-a rather than measured in the water.
What will I see diving Comoros?: The most consistently recorded species are Humpback whale (hit-or-miss) and Green turtle (likely), from 51 records within 60 km.
Does Comoros get tropical storms?: Yes. Over 30 years of records a storm passed within 250 km in Nov–Apr, most often in January at 4 of 30 years.
Is there current in Comoros?: The tide rises and falls 3.5 m around the full and new moon, against 1.4 m in between. How much of that becomes current depends on the shape of the channel.
When should I avoid Comoros?: January is the weakest month for conditions.
How do you dive Comoros?: Mostly from day boats. Trips run through the season, May–Dec.