Marine life abundance forecast
A Marine Life Index (scored between 0-100) for every site, updated daily. See which days will be better or worse than usual — up to a week ahead.
Know what you’ll see before you dive.
The first app that forecasts marine life abundance and underwater visibility at more than 28,000 dive sites worldwide. Plan your next trip with comprehensive ocean intelligence, not just the weather report.
Launching early June · Your first week of Pro is free · No card required
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Dive sites
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Marine species
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Dive regions
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Ocean data coverage
Institutional-grade ocean dataDaily ForecastsiNaturalist SynciOS 26 · iPhone & iPad
The breakthrough
The first app that forecasts
what’s happening underwater.
Two proprietary, best-in-class forecasting models, trained on institutional-grade ocean data and decades of marine surveys. One predicts marine life abundance. The other predicts underwater visibility. Both run daily at every dive site on Earth. Nobody else does either.
Underwater visibility forecast
The only consumer app that predicts how clear the water will be at dive sites anywhere on Earth. Book the boat with confidence.
10-year monthly climatology
Every site shows monthly averages of key variables: water temperature, visibility, currents, and more. Identify the best months to visit based on 10 years of real data.
Complete water conditions
Depth-resolved temperatures: at the surface, 10m/30ft deep, and 30m/90ft. Currents, wave height, tides, sun, and moon — everything that might affect your dive.
Seasonal events calendar
Bucket-list marine events with predicted timing windows: sardine runs, manta cleaning stations, hammerhead schools, whale shark gatherings, spawning events, and many more.
Institutional-grade data
Built on trusted satellite and oceanographic data from NASA, NOAA, European Space Agency, and other leading sources. Know you have the best information available in the palm of your hand.
Find your next dive
Four ways in.
Any ocean.
How do you find your next dive site? DiveSight lets you start with whatever’s on your mind — a destination, a species, your current location, or the season you’re seeking. Every path leads to the same forecast.
By destination
Pick a place
Browse a living heat map of 28,000+ dive sites — every major reef on Earth, plus the hidden sites between them. Zoom into Raja Ampat, Cozumel, the Red Sea, Palau, anywhere else. Tap any pin for live conditions and the 7-day forecast.
MaldivesRaja AmpatCozumelGalápagosRed Sea
By species
Find a creature
Search 6,000+ marine species — hammerheads, mantas, mola mola, mandarinfish, nudibranchs. Tap any species to see the dive sites where you can see it, the seasons it shows up, and the regions it calls home. The deepest species-to-geography interlinking in any consumer app.
HammerheadsManta raysWhale sharksMandarinfish
Around me
Dive where you are
Tap once and see every dive site within range — sortable by today's conditions, marine life index, or distance. Live forecasts, the next 7 days, and the wildlife you're most likely to see, without typing a thing. Perfect for layovers, road trips, and locals.
Nearest sitesToday's bestThis weekendQuick trips
By season
Catch the moment
A calendar of bucket-list events with predicted timing windows: the sardine run, manta cleaning stations, hammerhead schools, whale shark aggregations, spawning events. Find out what's peaking right now — and where in the world to go for it.
Sardine runManta seasonHammerhead schoolsSpawning
Discover
A living heat map
of the diving world.
28,000+ dive sites rendered as a global density map — the world’s largest mapped dive-site database. Zoom into Raja Ampat, the Red Sea, Cozumel, the Maldives. Tap any pin for live conditions and the 7-day forecast.
- Every major reef on Earth
Coral Triangle, Caribbean, Galapagos, Great Barrier Reef, Maldives, Palau, Bali — and the hidden sites between them.
- Skill-tagged sites
Every site shows a Beginner / Intermediate / Advanced tag taking into account depth, entry type, and currents. Search “beginner dives in Cabo” and it just works.
- One tap to plan
Open a site to see today’s conditions, the 7-day forecast, the 10-year monthly climatology, and the wildlife you’re likely to see.
- Use it offline
Download full dive site and species data for any region (Pro). Works on a boat, in a remote resort, or anywhere without signal.
Wildlife finder
Find the species
you’re seeking.
6,000+ marine species — from hammerheads and mantas to nudibranchs and mandarinfish. Tap a species to see exactly where to find it, when it shows up, and which sites it’s on right now. The deepest species-to-geography interlinking available in any consumer app.
⌕ Where can I see hammerheads right now?
⌕ When does the sardine run start?
⌕ Best dives in Indonesia for mantas next month
⌕ Whale shark season in the Maldives
Log & contribute
A logbook divers want to use.
A life list the ocean has been waiting for.
Every dive becomes part of a personal life list of the ocean — and, optionally, part of the global biodiversity record. The first dive app that gives back to the science it depends on.
Universal dive logbook
Imports from every major dive computer file format — including dive logs recorded on Apple Watch dive apps. Ocean conditions auto-fill from the live data pipeline. Each dive linked to the marine life you saw.
Marine life-list
A birder-style life list for the ocean. Quick-log species at your current location or any chosen site. Every sighting tied back to the dive it came from, backed by the 6,000-species catalog.
Two-way iNaturalist sync
Species you log in DiveSight (with iNat connected) flow into the global biodiversity record; iNat observations at dive sites flow back into your DiveSight life-list. The first dive-planning app that contributes back to citizen science as a first-class feature.
Built on real ocean science
Institutional-grade ocean data.
DiveSight is built on institutional-grade satellite and oceanographic data, fused with proprietary forecasting models — never crowdsourced guesses.
10+
Years of climatology per site
28K+
Dive sites covered
Daily
Data refresh
100%
Attribution-traceable
Why it matters
Most condition apps for divers either repackage shallow surface weather — blind to what’s actually happening underwater — or lean on user-submitted reports, which are inherently sparse: only a handful of sites get logged, only on the days someone happens to dive them. DiveSight is built on the same satellite and oceanographic data feeds that governments and research institutions use to monitor the ocean continuously, everywhere — and then complements that with the dive logs users contribute in the app.
What we feed the models
Satellite ocean colorSea surface conditionsTidal predictionsGlobal ocean circulationSurface weatherSpecies biodiversity records
Every data point in DiveSight traces back to a published, citable source. See attributions →
How DiveSight compares
One app.
Not a dozen.
Some of what DiveSight does exists somewhere else — scattered across a dozen apps, each doing one piece. DiveSight is the only app that brings them all into one place, with deeper data than any of them and a purpose-built experience for each.
| Feature | DiveSight | Surfline | Windy | Subsurface | Seabook | Oceanic+ |
|---|---|---|---|---|---|---|
| Marine life abundance forecast | 7-day | — | — | — | — | — |
| Underwater visibility forecast | 7-day, global | — | — | — | — | — |
| Dive sites mapped | 28,000+ | Surf breaks | Global grid | User-entered | — | User-entered |
| Marine species linked to sites | 6,000+ | — | — | — | 1,700 (ID only) | — |
| Depth-resolved temperature | Surface / 10m / 30m | — | Surface only | — | — | — |
| Tidal predictions per site | ✓ | Surf breaks | Global grid | — | — | — |
| 10-year monthly climatology per site | ✓ | — | — | — | — | — |
| Seasonal events calendar | ✓ | — | — | — | — | — |
| Dive logbook with computer imports | ✓ | — | — | ✓ | — | ~ |
| Two-way iNaturalist sync | ✓ | — | — | — | — | — |
| Offline mode | yes (Pro) | ✓ | ~ | ✓ | — | ✓ |
Comparisons reflect publicly documented features at time of publication. We respect the apps above — many DiveSight users use one or more of them. The point is the gap in the middle. See the deeper comparison →
Pricing
Free to start. Pro for the full experience.
Every new account starts with a full week of Pro — on us, no card required. After that, keep the free plan or upgrade anytime.
Free plan
The most generous free plan in diving.
The free tier ships with 15,000+ dive sites and 3,000+ marine species — more of both than any other dive app we’re aware of — plus the most expansive set of live ocean conditions available in a free dive plan, today’s marine life abundance index, intelligent search, the seasonal events calendar, unlimited logs, and two-way iNaturalist sync. Pro adds the 7-day forecasts, 10-year climatology, offline mode, cloud sync & backup, and log exports.
FeaturesFreePro
Dive sites15,000Unlimited
Marine species3,000Unlimited
Favorites25Unlimited
Dive logsUnlimitedUnlimited
Marine life logsUnlimitedUnlimited
Custom dive sites10Unlimited
Live ocean conditions✓✓
Intelligent search✓✓
Seasonal events✓✓
7-day forecasts—✓
10-year monthly averages—✓
Offline dive info—✓
Offline species guide—✓
Cloud sync & backup—✓
Log exports—✓
Weekly
$4.99/week
Billed weekly
Popular
Monthly
$9.99/month
Save 54%
Best value
Annual
$99.99/year
Save 61%
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Launching early June · Your first week of Pro is free · No card required
Subscriptions auto-renew unless cancelled at least 24 hours before the end of the period. Manage anytime in your App Store account.
Questions
Frequently asked.
What does DiveSight actually do?+
DiveSight forecasts marine life abundance and underwater visibility at 28,000+ dive sites, using proprietary models trained on satellite and oceanographic data from Copernicus Marine, HYCOM, and NASA.
How does the visibility forecast work?+
It predicts underwater clarity at the dive-site scale from satellite and oceanographic inputs, updated daily. We don't know of another consumer app that forecasts visibility at this resolution.
How does DiveSight forecast marine life abundance?+
A proprietary model trained on satellite ocean data, sea surface conditions, tidal state, lunar phase, and historical marine surveys. Output is a 0–100 Marine Life Index updated daily for each of 28,000+ dive sites.
How accurate are the forecasts?+
Both forecasts validate above 80% accuracy globally. And the more you log — your dives, the species you saw, the conditions you found — the more the models learn about the sites you care about, so forecasts at your favorite spots get sharper over time.
How many dive sites does DiveSight cover?+
28,000+ dive sites across 1,400+ dive regions worldwide. Coverage includes the Coral Triangle, Caribbean, Red Sea, Raja Ampat, Palau, the Maldives, Cozumel, Bali, and the Galápagos.
Is DiveSight free?+
Yes — and the free tier is best-in-class on its own. It includes 15,000+ dive sites and 3,000+ marine species (more than any other dive app we're aware of), the most expansive set of live ocean conditions available in a free dive plan, today's marine life abundance index, intelligent search, the seasonal events calendar, unlimited dive and marine-life logs, 25 favorites, 10 custom sites, and two-way iNaturalist sync. Pro unlocks all 28,000+ sites, 6,000+ species, 7-day forecasts, 10-year climatology, depth-resolved data, offline mode, cloud sync & backup, and log exports for $4.99/week, $9.99/month, or $99.99/year. Your first week of Pro is free, no card required.
Does DiveSight sync with iNaturalist?+
Yes — two-way iNaturalist sync ships at launch. Species you log in DiveSight (with an iNat account connected) flow into the global biodiversity record; any iNat observations you make at a dive site flow back into your DiveSight life-list. We think a dive-planning app should give back to the citizen-science databases it relies on, so this is a first-class feature, not an afterthought.
Can DiveSight import dive logs from my dive computer?+
Yes — DiveSight's logbook imports from nearly every major dive computer file format, including dive logs recorded on Apple Watch dive apps. Ocean conditions auto-fill from the live data pipeline, and each dive can be linked to the marine life you saw on it.
What is the 10-year monthly climatology?+
Every dive site in DiveSight shows monthly averages of water temperature, visibility, currents, and other key conditions over the past decade — so you can see how a given month at a given site has actually behaved year over year, not just how a guidebook describes it.
Who built DiveSight?+
DiveSight is an independent project — not a venture-backed company — built by three siblings: a statistician, a marine ecologist, and a physicist, all lifelong divers. The species catalog at the heart of the app started as an informal database the three of them had been building together for years from their own sightings.
Which platforms is DiveSight on?+
DiveSight is a native iOS app for iPhone and iPad, built for iOS 26 and newer. A full-featured web app (right here on divesight.ai) and an Android version are both in development — sign up below to be notified when they ship.
The ocean, forecasted.
Your next great dive starts with knowing what’s actually down there.
Launching early June · Your first week of Pro is free · No card required