WhenToDive
A field guide to when & where

Where the water is right
right now.

Find the species. Find the season. Find the spot. A field guide to what to see — and where and when to see it.

Photo: Stanislav Stelmakhovich / CC0

Start with what you know

Open full search →
By month

I have dates locked in.

Show destinations at their seasonal peak for a given month, ranked by conditions and wildlife.

By species

I'm chasing a creature.

Whale sharks, manta aggregations, sardine run — pick a species and we'll find the window.

By destination

I know where I want to go.

Jump to a destination page for the full 12-month profile, dive sites, and seasonal species notes.

Diving now — August's best

Full August guide →
  1. Cocos Island

    Cocos Island

    Costa Rica · eastern pacific
    24–27°C water viz 15–25m

    Peak: Scalloped Hammerhead · Galápagos Shark · Silky Shark

    5
  2. Galápagos

    Galápagos

    Ecuador · eastern pacific
    19–22°C water viz 10–20m

    Peak: Scalloped Hammerhead · Whale Shark · Galápagos Shark

    5
  3. Gansbaai

    Gansbaai

    South Africa · atlantic
    12–14°C water viz 3–10m

    Peak: Great White Shark · Seals & Sea Lions

    5
  4. Komodo

    Komodo

    Indonesia · southeast asia
    22–26°C water viz 20–30m

    Peak: Reef Manta Ray · Pygmy Seahorse · Wobbegong Shark

    5
  5. La Paz (Sea of Cortez)

    La Paz (Sea of Cortez)

    Mexico · eastern pacific
    28–30°C water viz 20–30m

    Peak: Seals & Sea Lions · Munk's Devil Ray (Mobula) · Dolphins

    5
  6. Maldives (Central Atolls)

    Maldives (Central Atolls)

    Maldives · indian ocean
    28–30°C water viz 15–25m

    Peak: Reef Manta Ray · Whale Shark · Dolphins

    5
  7. Lembeh Strait

    Lembeh Strait

    Indonesia · southeast asia
    26–28°C water viz 10–15m

    Peak: Frogfish · Pygmy Seahorse · Mandarinfish

    5
  8. Marsa Alam

    Marsa Alam

    Egypt · red sea
    28–30°C water viz 20–30m

    Peak: Dugong · Dolphins

    5

The marquee encounters

All species →

The dive year, at a glance

Across 28 destinations
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Global average across destinations Poor Moderate Good

Browse the oceans

All destinations →
The method

Structured data, not travel-blog anecdotes.

Every destination is scored month-by-month on water temperature, visibility, conditions, and species presence — sourced from operator logs, ocean datasets, and dive report archives. Each field is citable. No sponsored rankings.

Read the methodology →
Destinations
28
globally significant dive sites
Species profiled
32+
with seasonal presence maps
Data points
1,008
destination × month × field
Last updated
August
2026