⛵ Sailing
Sailing weather, scored for the right breeze
Sailing is the one sport where too little wind is as bad as too much. BlockCast scores every block of your week for sailing against a wind band of 9 to 32 km/h (5 to 17 knots), adds gusts, swell and tide near the coast, and turns the week into a heat map you can read from the dock.
Free. No account, no ads, no tracking. iPhone, iPad and any web browser.
What BlockCast checks for sailing
Every block gets a risk score from 0 to 100: green under 25, yellow under 55, red above. The worst factor drives the score and the others add to it. These are the default weights; you can change any of them in the app under Adjust.
Comfortable feels-like temperature: 5 to 33 °C (41 to 91 °F). Ideal wind: 9 to 32 km/h (5 to 17 knots). Less is a risk too.
How it works
- Pick sailing and your spot. Use your location or search any place in the world, and save up to three.
- Read your week at a glance. Choose 2, 3, 4 or 6 hour blocks and the hours you actually play. Tap any block for the hour-by-hour detail and the reason behind its colour.
- Plan it and stop checking. Add the session to your planner and your calendar. BlockCast re-checks every forecast and tells you if a planned session turns bad.
Sailing weather questions
What is a good wind speed for sailing?
BlockCast’s default band is 9 to 32 km/h (about 5 to 17 knots): enough to move a keelboat, not so much that you are reefing all afternoon. Below the band counts as risk too, so a light-air day shows yellow and a glassy one red. Racers and dinghy sailors can move both ends under Adjust.
Does BlockCast include gusts and waves?
Yes. Gusts are scored on their own, and near the coast swell height and the tide cycle are part of the sailing score.
Is BlockCast a marine forecast?
No. It is a planning tool built on public forecast models. Check the official marine forecast and warnings before you leave the dock.
Where the data comes from
Forecasts come from Open-Meteo. Rain is the wettest of three models (the local best match, ECMWF and Canada’s GEM), so a green block means they all agree. Radar is the North American composite from Environment and Climate Change Canada; official alerts come from Environment Canada and the US National Weather Service.