Dive Weather & Marine Forecast

Weather — Key Features

• Divability score — instant go/no-go assessment for any dive site
• Hourly marine forecast with wind, waves, and water temperature
• Tide charts with high/low tide times and heights
• Save and monitor your favorite dive spots
• Interactive map to explore dive sites worldwide
• Customizable units — metric or imperial, your choice

Weather — How It Works

Search any dive site by name or drop a pin on the map. DiveToolbox aggregates marine-forecast data — significant wave height, peak wave period, wind speed and direction, swell direction, sea-surface temperature, air temperature, cloud cover, precipitation, and tidal stage — and combines them into a single 0-100 divability score per hour over the next 7 days. The scoring formula penalises rough water (wave height ≥1.5 m combined with a short period drops the score steeply, because choppy short-period swell is what actually makes a surface swim miserable and entry/exit dangerous), strong wind, very cold or very warm water relative to thermal protection, and adverse tidal phase for shore dives. Save favourite spots to a dashboard that surfaces the next clear weather window at a glance — useful for catching a one-day flat sea between fronts, or scheduling a club outing without combing through eight independent forecasts. Data refreshes hourly and is informational only: always reassess on site before splashing.

Why Check Weather with DiveToolbox?

• Purpose-built for divers — not a generic weather app
• Divability score saves you guesswork on go/no-go decisions
• Tide and current data integrated in one view
• Monitor multiple dive sites from a single dashboard

Weather — Frequently Asked Questions

What is the divability score?

The divability score is a single 0-100 number per hour combining significant wave height, peak wave period, wind speed and direction, sea-surface temperature, air temperature, cloud cover, precipitation, and tidal stage. The formula penalises rough water (wave height ≥1.5 m and short period drops the score steeply, because choppy short-period swell is what makes surface swims miserable and entry/exit dangerous), strong wind, very cold or very warm water relative to typical thermal protection, and adverse tidal phase for shore dives. A score above 70 is generally a green-light condition for recreational dives.

How accurate is the marine forecast?

Forecast accuracy is best in the first 24-48 hours (~80% reliable on wave height and wind) and degrades steadily beyond 3-4 days. The data feeds come from Open-Meteo Marine and standard weather APIs that consolidate ECMWF, NOAA GFS, and regional models. For coastal sites, forecast skill is good; for offshore sites and tropical systems it remains harder. Always reassess on site before splashing — local effects (headland funnelling, tidal eddies, surface chop) can differ significantly from the open-water forecast even at the same coordinates.

Can I save my favorite dive sites?

Yes — saving favourite sites is free up to 2 spots, and the premium tier unlocks up to 100 saved sites. The dashboard surfaces the next clear weather window across all your spots at a glance, so you can spot a calm day between fronts or schedule a club outing without combing through eight separate forecasts. Saved spots include the exact coordinates, custom labels, and per-spot tidal-station overrides for accurate tide tables. Saving and viewing tides for unlimited locations is part of the free tier.

Does it show tide information?

Yes — the weather tool includes tidal predictions for coastal locations worldwide. Each saved spot can be linked to a nearby tidal reference station or use the closest automatic match. The dashboard shows tide height curves alongside the divability forecast, so you can see slack water windows for sites that require diving on the turn, and high or low water levels for shore-entry sites with tidal range concerns. Slack windows are computed automatically as the times of minimum tidal-current magnitude.

Is weather data available worldwide?

Yes — marine weather and tide data are available for coastal and offshore locations worldwide, with no geographic restrictions. You can search by site name or drop a pin on the interactive map to get conditions for any coordinate. Data quality is highest in regions with dense observation networks (Mediterranean, North Atlantic, Caribbean, Australia, South-East Asia) and slightly lower in more remote oceans. The forecast horizon is 7 days everywhere, refreshed hourly.

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