• CLASSIC IWINDSURF
    Classic myiWindsurfClassic Wind & Weather maps and graphs
Hello Guest
 • 

Classic iWindsurf
kiter? see iKitesurf.com
Grab the iWindsurf Mobile App & Sign On to the New iWindsurf Website
Hi guest · Get your free membership now · Log In ·
Alcatraz
 > Current Wind Graph
 > Meteogram
 > Onsite Report
 > Wind Yesterday
 > Last 7 Days
 > Wind Archive
 > Tides
 > Local Info
 > Sensor Notes
CA- sf south bay

Human Forecasts
 > Daily Briefing
 > Baja Guide
 > Forecast Blog
 > Extended Disc.

Real-Time Data
 > Dynamic Map
 > Wind Obs Map
 > Radar + Satellite Map
 > Wind Obs Summary
 > Pressure Report

Computer Forecasts
 > Model Tables
 > Wind Vector Fx Map
 > Wind FlowViz Fx Map
 > Tidal Currents Map

More Maps

Other Resources

Watches/Warnings
>None Active




New iWindsurf: Select your region for wind observations & forecasts:
North America | Europe | South America | Australia & Oceania | Asia | Africa

Human Meteorologist Forecasts:   Today's Briefing Extended Discussion
Computer Model Data: 5/21 | 5/22 | 5/23 | 5/24 | 5/25 | 5/26 | 5/27   |  >>Wind Obs Map<<

Alcatraz Computer Forecast Table - Meteogram

Help us improve this product by taking the survey!

   Quick Look  
More Hours
 Beta-WRF 1km WF-WRF 3km - SF Bay NAM 12km GFS 0.5 Deg ECMWF - 9km  Help
DateThursday, May 21Friday, May 22
Time2am5am8am11am2pm5pm8pm11pm2am5am8am11am2pm5pm8pm11pm
Wind (mph)55468877765691088
Direction
Temperature (F)52505052585853504847485055545251
Additional DataShow Additional Data
DateSaturday, May 23Sunday, May 24
Time2am5am8am11am2pm5pm8pm11pm2am5am8am11am2pm5pm8pm11pm
Wind (mph)776791086554710976
Direction
Temperature (F)50505053555553525150535962615652
Additional DataShow Additional Data
DateMonday, May 25Tuesday, May 26
Time2am5am8am11am2pm5pm8pm11pm2am5am8am11am2pm5pm8pm11pm
Wind (mph)45571087688735655
Direction
Temperature (F)51515460626055525253545860615754
Additional DataShow Additional Data
DateWednesday, May 27Thursday, May 28
Time2am5am8am11am2pm5pm8pm11pm2am5am8am11am2pm5pm8pm11pm
Wind (mph)645610108754116864
Direction
Temperature (F)52525663666356535251556167676056
Additional DataShow Additional Data
DateFriday, May 29Saturday, May 30
Time2am5am8am11am2pm5pm8pm11pm2am5am8am11am2pm5pm8pm11pm 
Wind (mph)532589877864812109 
Direction 
Temperature (F)55545864676660555352546064625651 
Additional DataShow Additional Data

© Copyright 2026 WeatherFlow, Inc · Contact Us ·