Can you snorkel in Mnemba Atoll today?

Conditions look marginal right now — no clearly safe snorkeling window is forecast in Mnemba Atoll over the next 72 hours. Check the hourly table for the calmest period.

What is the best time of day to snorkel in Mnemba Atoll?

Snorkel during daylight, ideally in the morning before the wind picks up, and around high slack tide when water is clearest and currents are weakest. SnorkelForecast scores every daylight hour in Mnemba Atoll so you can pick the calmest window.

What is the best tide for snorkeling?

High slack tide — within about an hour of the high-tide peak when currents are weakest — is the safest, clearest window. Strong low tides, strong tidal flow near channels or headlands, and large tidal-range days reduce score.

Mnemba Atoll Snorkel Report Today

Tanzania · Updated Tue 03:13 (EAT) · Source: Snapshot

The skinny

Marginal Report Wed 03:37

Mnemba Atoll looks marginal today. The least-bad daylight window is around Wed 07:00, but waves is limiting the forecast.

Score: 4.4/10

Best time: Wed 07:00

Main risk: Waves

Best morning signal: Wed 07:00 (Fair).

Best afternoon signal: Wed 18:00 (Fair). Peak afternoon wind is about 5.2 m/s.

Email me when it is good

Sunrise

06:34

Sunset

18:23

Water

25.7°C

Max air

26.4°C

Sky

Clear

17% cloud

No safe window in the next 72 hours

Use the best-available section for the least-bad times.

3-day planner Best available Show data

3-day planner

Wednesday

⚠️ fair conditions

Main blocker: Waves

Thursday

⚠️ fair conditions

Main blocker: Waves

Friday

❌ poor conditions

Main blocker: Waves

Best available hours

Wed 04:00 — Fair (0.44) · still limited by waves, tide/current
Thu 15:00 — Fair (0.44) · still limited by waves, tide/current
Wed 15:00 — Fair (0.42) · still limited by waves, tide/current

Why this verdict

Main blockers across the next 72 hours:

Waves (50 hours)
Tide/current (50 hours)
Darkness (26 hours)

Jellyfish drift risk

Drift estimate from wind, swell, current and warm water.

Low · 34/100

Low drift risk now.

warm water supports seasonal jellyfish activity; surface drift/current is noticeable; local shoreline exposure is not mapped yet.

Sightings override the model: if you see small purple jellyfish with long trailing tentacles, treat them as sting-capable and give them space.

Upcoming high tides

Wed 06:00, Wed 18:00, Thu 07:00, Thu 20:00

Nearby alternatives in Tanzania

Mafia Island

238 km away

❌ Poor

Advanced forecast data

Viewing historical data

Sat 00:00 – Tue 00:00 (EAT)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.31 around Sat 07:00; 0 of 24 hours are good, fair, or excellent.

Score trend, higher is better. Excellent ≥ 0.72, good 0.55–0.72, fair 0.35–0.55.

Conditions (24h trends)

Tap a chart to load just that series.

0/24 sampled hours stay at or below 0.36m (range 0.94m to 1.06m).

Wind is at or below 5.4m/s in 24/24 sampled hours (range 2.61 to 5.29m/s).

Tides range from -0.56m to 1.56m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview

Sat 00:00 poor ❌ Limited

Sat 01:00 poor ❌ Limited

Sat 02:00 poor ❌ Limited

Sat 03:00 poor ❌ Limited

Sat 04:00 poor ❌ Limited

Sat 05:00 poor ❌ Limited

Sat 06:00 poor ❌ Limited

Sat 07:00 poor ❌ Limited

Sat 08:00 poor ❌ Limited

Sat 09:00 poor ❌ Limited

Sat 10:00 poor ❌ Limited

Sat 11:00 poor ❌ Limited

Sat 12:00 poor ❌ Limited

Sat 13:00 poor ❌ Limited

Sat 14:00 poor ❌ Limited

Sat 15:00 poor ❌ Limited

Sat 16:00 poor ❌ Limited

Sat 17:00 poor ❌ Limited

Sat 18:00 poor ❌ Limited

Sat 19:00 poor ❌ Limited

Sat 20:00 poor ❌ Limited

Sat 21:00 poor ❌ Limited

Sat 22:00 poor ❌ Limited

Sat 23:00 poor ❌ Limited

Sun 00:00 poor ❌ Limited

Sun 01:00 poor ❌ Limited

Sun 02:00 poor ❌ Limited

Sun 03:00 poor ❌ Limited

Sun 04:00 poor ❌ Limited

Sun 05:00 poor ❌ Limited

Sun 06:00 poor ❌ Limited

Sun 07:00 fair ⚠️ Fair

Sun 08:00 fair ⚠️ Fair

Sun 09:00 poor ❌ Limited

Sun 10:00 poor ❌ Limited

Sun 11:00 poor ❌ Limited

Sun 12:00 fair ⚠️ Fair

Sun 13:00 fair ⚠️ Fair

Sun 14:00 fair ⚠️ Fair

Sun 15:00 fair ⚠️ Fair

Sun 16:00 poor ❌ Limited

Sun 17:00 poor ❌ Limited

Sun 18:00 poor ❌ Limited

Sun 19:00 poor ❌ Limited

Sun 20:00 poor ❌ Limited

Sun 21:00 poor ❌ Limited

Sun 22:00 poor ❌ Limited

Sun 23:00 poor ❌ Limited

Mon 00:00 poor ❌ Limited

Mon 01:00 poor ❌ Limited

Mon 02:00 poor ❌ Limited

Mon 03:00 poor ❌ Limited

Mon 04:00 fair ⚠️ Fair

Mon 05:00 fair ⚠️ Fair

Mon 06:00 fair ⚠️ Fair

Mon 07:00 fair ⚠️ Fair

Mon 08:00 fair ⚠️ Fair

Mon 09:00 fair ⚠️ Fair

Mon 10:00 fair ⚠️ Fair

Mon 11:00 fair ⚠️ Fair

Mon 12:00 fair ⚠️ Fair

Mon 13:00 fair ⚠️ Fair

Mon 14:00 fair ⚠️ Fair

Mon 15:00 fair ⚠️ Fair

Mon 16:00 poor ❌ Limited

Mon 17:00 poor ❌ Limited

Mon 18:00 poor ❌ Limited

Mon 19:00 poor ❌ Limited

Mon 20:00 poor ❌ Limited

Mon 21:00 poor ❌ Limited

Mon 22:00 poor ❌ Limited

Mon 23:00 poor ❌ Limited

Scoring methodology (for technical users)

We score each hour from 0 to 1 using daylight and these weighted components:

Wave height (35%): best below 0.36m, then decreases as it rises.
Wind speed (25%): best below 5.4m/s, lower is better.
Sea surface temperature (15%): best within 20.6°C to 30.4°C.
Tide and currents (15%): best around slack/high-tide windows.
Daylight (10%): visibility and safety gate (outside daylight scores lower).

Detailed hourly data table

Time	Wave (m)	Wind (m/s)	Sea temp (°C)	Status
Sat 00:00	1.06 · high	3.27 · good	26.40 · good	poor
Sat 01:00	1.06 · high	3.24 · good	26.40 · good	poor
Sat 02:00	1.04 · high	3.18 · good	26.40 · good	poor
Sat 03:00	1.04 · high	2.91 · good	26.40 · good	poor
Sat 04:00	1.04 · high	2.95 · good	26.40 · good	poor
Sat 05:00	1.02 · high	3.63 · good	26.40 · good	poor
Sat 06:00	1.02 · high	3.58 · good	26.40 · good	poor
Sat 07:00	1.00 · high	3.54 · good	26.40 · good	poor
Sat 08:00	1.00 · high	3.58 · good	26.50 · good	poor
Sat 09:00	0.98 · high	3.54 · good	26.50 · good	poor
Sat 10:00	0.98 · high	3.83 · good	26.60 · good	poor
Sat 11:00	0.98 · high	4.38 · good	26.70 · good	poor
Sat 12:00	0.98 · high	4.79 · good	26.70 · good	poor
Sat 13:00	1.00 · high	5.26 · good	26.70 · good	poor
Sat 14:00	1.00 · high	5.29 · good	26.60 · good	poor
Sat 15:00	1.02 · high	4.63 · good	26.60 · good	poor
Sat 16:00	1.00 · high	4.34 · good	26.50 · good	poor
Sat 17:00	1.00 · high	4.41 · good	26.50 · good	poor
Sat 18:00	0.98 · high	4.20 · good	26.50 · good	poor
Sat 19:00	0.98 · high	3.67 · good	26.50 · good	poor
Sat 20:00	0.96 · high	3.60 · good	26.40 · good	poor
Sat 21:00	0.96 · high	3.56 · good	26.40 · good	poor
Sat 22:00	0.94 · high	3.07 · good	26.40 · good	poor
Sat 23:00	0.94 · high	2.61 · good	26.40 · good	poor
Sun 00:00	0.92 · high	2.17 · good	26.40 · good	poor
Sun 01:00	0.90 · high	2.19 · good	26.40 · good	poor
Sun 02:00	0.90 · high	2.45 · good	26.40 · good	poor
Sun 03:00	0.88 · high	2.15 · good	26.40 · good	poor
Sun 04:00	0.86 · high	1.72 · good	26.40 · good	poor
Sun 05:00	0.86 · high	1.93 · good	26.40 · good	poor
Sun 06:00	0.84 · high	2.20 · good	26.40 · good	poor
Sun 07:00	0.70 · high	2.64 · good	26.10 · good	fair
Sun 08:00	0.68 · high	2.72 · good	26.20 · good	fair
Sun 09:00	0.68 · high	3.10 · good	26.20 · good	poor
Sun 10:00	0.68 · high	3.63 · good	26.30 · good	poor
Sun 11:00	0.70 · high	4.16 · good	26.40 · good	poor
Sun 12:00	0.70 · high	4.45 · good	26.40 · good	fair
Sun 13:00	0.72 · high	5.20 · good	26.40 · good	fair
Sun 14:00	0.72 · high	5.19 · good	26.30 · good	fair
Sun 15:00	0.74 · high	4.35 · good	26.30 · good	fair
Sun 16:00	0.76 · high	4.15 · good	26.20 · good	poor
Sun 17:00	0.76 · high	4.36 · good	26.20 · good	poor
Sun 18:00	0.78 · high	4.21 · good	26.20 · good	poor
Sun 19:00	0.78 · high	3.87 · good	26.20 · good	poor
Sun 20:00	0.80 · high	3.92 · good	26.10 · good	poor
Sun 21:00	0.80 · high	3.20 · good	26.10 · good	poor
Sun 22:00	0.80 · high	3.13 · good	26.10 · good	poor
Sun 23:00	0.80 · high	2.47 · good	26.10 · good	poor
Mon 00:00	0.80 · high	2.55 · good	26.10 · good	poor
Mon 01:00	0.78 · high	2.53 · good	26.10 · good	poor
Mon 02:00	0.78 · high	2.24 · good	26.10 · good	poor
Mon 03:00	0.76 · high	2.01 · good	26.10 · good	poor
Mon 04:00	0.76 · high	2.35 · good	26.10 · good	fair
Mon 05:00	0.76 · high	2.96 · good	26.10 · good	fair
Mon 06:00	0.76 · high	3.36 · good	26.10 · good	fair
Mon 07:00	0.78 · high	3.80 · good	26.20 · good	fair
Mon 08:00	0.78 · high	3.92 · good	26.20 · good	fair
Mon 09:00	0.80 · high	4.00 · good	26.30 · good	fair
Mon 10:00	0.82 · high	4.35 · good	26.40 · good	fair
Mon 11:00	0.82 · high	4.65 · good	26.40 · good	fair
Mon 12:00	0.84 · high	4.26 · good	26.40 · good	fair
Mon 13:00	0.84 · high	4.29 · good	26.40 · good	fair
Mon 14:00	0.84 · high	4.20 · good	26.40 · good	fair
Mon 15:00	0.84 · high	3.53 · good	26.30 · good	fair
Mon 16:00	0.84 · high	3.89 · good	26.30 · good	poor
Mon 17:00	0.86 · high	4.54 · good	26.30 · good	poor
Mon 18:00	0.86 · high	5.13 · good	26.20 · good	poor
Mon 19:00	0.86 · high	4.84 · good	26.20 · good	poor
Mon 20:00	0.88 · high	4.56 · good	26.20 · good	poor
Mon 21:00	0.88 · high	4.66 · good	26.20 · good	poor
Mon 22:00	0.88 · high	4.58 · good	26.20 · good	poor
Mon 23:00	0.90 · high	4.63 · good	26.20 · good	poor