Daily Superforecast
asLast update: 14:37 local time
Saturday, Sep 13
Wind
Weather
Waves
Tides
233°
SW
00h
11 kts
max 12 kts
15° C
15
92%
1014 hpa
1.2 m
14 s
0.2 m
241°
WSW
01h
11 kts
max 14 kts
16° C
16
93%
1013 hpa
1.2 m
14 s
0.4 m
244°
WSW
02h
11 kts
max 14 kts
15° C
15
97%
1013 hpa
1.2 m
14 s
0.7 m
243°
WSW
03h
10 kts
max 13 kts
15° C
15
99%
1012 hpa
1.2 m
14 s
0.9 m
242°
WSW
04h
9 kts
max 13 kts
15° C
15
99%
1013 hpa
1.1 m
14 s
1.1 m
242°
WSW
05h
9 kts
max 12 kts
15° C
15
99%
1012 hpa
1.1 m
14 s
1.3 m
234°
SW
06h
9 kts
max 12 kts
15° C
15
95%
1013 hpa
1.1 m
14 s
05:46
1.3 m
241°
WSW
07h
9 kts
max 11 kts
15° C
15
97%
1014 hpa
1.1 m
14 s
1.2 m
238°
WSW
08h
9 kts
max 11 kts
0.06 mm
15° C
15
98%
1014 hpa
1.1 m
13 s
1.1 m
239°
WSW
09h
9 kts
max 12 kts
15° C
15
99%
1014 hpa
1.1 m
13 s
1.0 m
240°
WSW
10h
10 kts
max 13 kts
0.16 mm
14° C
14
99%
1015 hpa
1.1 m
13 s
10:02
0.9 m
242°
WSW
11h
10 kts
max 14 kts
0.12 mm
14° C
14
99%
1014 hpa
1.0 m
13 s
1.0 m
234°
SW
12h
10 kts
max 12 kts
15° C
15
92%
1014 hpa
1.0 m
13 s
1.1 m
245°
WSW
13h
12 kts
max 15 kts
15° C
15
93%
1015 hpa
1.0 m
13 s
1.3 m
246°
WSW
14h
13 kts
max 17 kts
15° C
15
95%
1014 hpa
1.0 m
13 s
1.6 m
247°
WSW
15h
15 kts
max 20 kts
15° C
15
97%
1013 hpa
1.1 m
13 s
1.8 m
253°
WSW
16h
15 kts
max 21 kts
0.07 mm
15° C
15
95%
1013 hpa
1.1 m
13 s
16:26
1.9 m
263°
W
17h
13 kts
max 19 kts
16° C
16
94%
1013 hpa
1.1 m
13 s
1.9 m
262°
W
18h
12 kts
max 17 kts
16° C
16
95%
1013 hpa
1.1 m
13 s
1.7 m
261°
W
19h
12 kts
max 19 kts
16° C
16
97%
1013 hpa
1.2 m
13 s
1.4 m
259°
W
20h
12 kts
max 18 kts
15° C
15
99%
1013 hpa
1.2 m
13 s
1.0 m
259°
W
21h
12 kts
max 18 kts
0.09 mm
15° C
15
99%
1013 hpa
1.2 m
13 s
0.6 m
263°
W
22h
9 kts
max 13 kts
16° C
16
97%
1013 hpa
1.3 m
13 s
0.2 m
258°
WSW
23h
8 kts
max 12 kts
15° C
15
98%
1013 hpa
1.3 m
13 s
0.1 m
Sunday, Sep 14
Wind
Weather
Waves
Tides
253°
WSW
00h
8 kts
max 11 kts
15° C
15
99%
1012 hpa
1.3 m
13 s
23:46
0.0 m
251°
WSW
01h
8 kts
max 11 kts
15° C
15
99%
1012 hpa
1.2 m
13 s
0.1 m
249°
WSW
02h
9 kts
max 11 kts
15° C
15
99%
1012 hpa
1.2 m
13 s
0.3 m
251°
WSW
03h
9 kts
max 12 kts
15° C
15
99%
1012 hpa
1.1 m
13 s
0.5 m
251°
WSW
04h
10 kts
max 13 kts
0.16 mm
15° C
15
99%
1012 hpa
1.1 m
13 s
0.8 m
253°
WSW
05h
10 kts
max 15 kts
0.1 mm
15° C
15
99%
1012 hpa
1.0 m
13 s
1.0 m
252°
WSW
06h
10 kts
max 15 kts
0.07 mm
15° C
15
99%
1012 hpa
1.0 m
13 s
1.2 m
253°
WSW
07h
10 kts
max 14 kts
15° C
15
99%
1013 hpa
0.9 m
13 s
07:21
1.3 m
255°
WSW
08h
9 kts
max 12 kts
15° C
15
99%
1013 hpa
0.9 m
13 s
1.3 m
247°
WSW
09h
7 kts
max 11 kts
15° C
15
99%
1013 hpa
0.9 m
12 s
1.2 m
241°
WSW
10h
8 kts
max 12 kts
15° C
15
99%
1014 hpa
0.9 m
12 s
1.1 m
235°
SW
11h
9 kts
max 12 kts
0.07 mm
15° C
15
99%
1014 hpa
0.8 m
12 s
11:21
1.0 m
239°
WSW
12h
10 kts
max 14 kts
0.18 mm
15° C
15
98%
1013 hpa
0.8 m
12 s
1.1 m
243°
WSW
13h
11 kts
max 16 kts
0.22 mm
16° C
16
98%
1013 hpa
0.9 m
12 s
1.2 m
245°
WSW
14h
12 kts
max 17 kts
0.17 mm
16° C
16
97%
1013 hpa
0.9 m
12 s
1.3 m
251°
WSW
15h
13 kts
max 18 kts
0.07 mm
16° C
16
95%
1012 hpa
0.9 m
11 s
1.5 m
254°
WSW
16h
13 kts
max 18 kts
16° C
16
95%
1011 hpa
0.9 m
11 s
1.7 m
254°
WSW
17h
12 kts
max 18 kts
16° C
16
94%
1011 hpa
0.9 m
11 s
1.8 m
253°
WSW
18h
11 kts
max 16 kts
16° C
16
95%
1011 hpa
1.0 m
11 s
17:32
1.8 m
248°
WSW
19h
11 kts
max 15 kts
16° C
16
97%
1011 hpa
1.0 m
11 s
1.7 m
240°
WSW
20h
10 kts
max 13 kts
16° C
16
97%
1010 hpa
1.1 m
11 s
1.4 m
229°
SW
21h
8 kts
max 11 kts
16° C
16
97%
1011 hpa
1.1 m
11 s
1.0 m
217°
SW
22h
7 kts
max 9 kts
16° C
16
97%
1011 hpa
1.1 m
11 s
0.6 m
215°
SW
23h
7 kts
max 9 kts
15° C
15
98%
1011 hpa
1.1 m
10 s
0.3 m
Monday, Sep 15
Wind
Weather
Waves
Tides
219°
SW
00h
7 kts
max 8 kts
15° C
15
98%
1011 hpa
1.1 m
10 s
0.1 m
221°
SW
01h
7 kts
max 7 kts
14° C
14
98%
1011 hpa
1.1 m
10 s
01:05
0.0 m
224°
SW
02h
7 kts
max 7 kts
0.1 mm
14° C
14
98%
1011 hpa
1.1 m
10 s
0.1 m
226°
SW
03h
6 kts
max 7 kts
0.11 mm
14° C
14
98%
1011 hpa
1.1 m
10 s
0.2 m
223°
SW
04h
5 kts
max 6 kts
0.11 mm
14° C
14
98%
1010 hpa
1.1 m
9 s
0.4 m
228°
SW
05h
4 kts
max 4 kts
0.09 mm
14° C
14
98%
1011 hpa
1.1 m
9 s
0.7 m
221°
SW
06h
4 kts
max 4 kts
0.07 mm
14° C
14
98%
1011 hpa
1.1 m
9 s
1.0 m
227°
SW
07h
3 kts
max 3 kts
0.06 mm
14° C
14
99%
1011 hpa
1.1 m
9 s
1.2 m
236°
SW
08h
3 kts
max 3 kts
14° C
14
99%
1011 hpa
1.1 m
9 s
1.4 m
244°
WSW
09h
2 kts
max 2 kts
14° C
14
99%
1012 hpa
1.1 m
9 s
08:41
1.4 m
255°
WSW
10h
2 kts
max 3 kts
0.05 mm
14° C
14
99%
1012 hpa
1.1 m
8 s
1.3 m
239°
WSW
11h
2 kts
max 3 kts
15° C
15
94%
1012 hpa
1.0 m
8 s
1.2 m
247°
WSW
12h
3 kts
max 4 kts
17° C
17
87%
1012 hpa
1.0 m
9 s
1.1 m
257°
WSW
13h
6 kts
max 8 kts
17° C
17
83%
1011 hpa
1.0 m
9 s
12:56
1.1 m
257°
WSW
14h
9 kts
max 12 kts
17° C
17
85%
1011 hpa
1.0 m
9 s
1.1 m
258°
WSW
15h
12 kts
max 15 kts
16° C
16
86%
1010 hpa
1.0 m
9 s
1.2 m
256°
WSW
16h
13 kts
max 15 kts
16° C
16
88%
1010 hpa
0.9 m
10 s
1.4 m
254°
WSW
17h
12 kts
max 15 kts
16° C
16
88%
1009 hpa
0.9 m
11 s
1.6 m
250°
WSW
18h
12 kts
max 14 kts
16° C
16
88%
1009 hpa
0.9 m
13 s
1.8 m
254°
WSW
19h
10 kts
max 13 kts
16° C
16
89%
1009 hpa
0.9 m
15 s
18:48
1.8 m
250°
WSW
20h
9 kts
max 10 kts
16° C
16
90%
1010 hpa
0.9 m
17 s
1.7 m
244°
WSW
21h
8 kts
max 9 kts
16° C
16
90%
1010 hpa
0.8 m
18 s
1.4 m
240°
WSW
22h
7 kts
max 8 kts
15° C
15
91%
1011 hpa
0.8 m
18 s
1.1 m
238°
WSW
23h
6 kts
max 7 kts
0.06 mm
15° C
15
91%
1011 hpa
0.8 m
19 s
0.7 m
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Additional information
General
This is the wind, wave and weather Superforecast for Alcatraz Island, San Francisco Bay in California, United States of America. Windfinder specializes in wind, waves, tides and weather reports & forecasts for wind related sports like kitesurfing, windsurfing, surfing, sailing or paragliding.
Superforecast
The Superforecast is based on the best high resolution weather prediction models. The Superforecast is available for Europe, North America, South Africa, Egypt and the Canary Islands. The horizontal resolution is 5 kilometers. The Superforecast is updated 4 times per day. Predictions are available in time steps of 1 hour for up to 3 days into the future. Forecast and Superforecast are based on different physical models and therefore may cause divergent predictions. Due to its higher horizontal resolution the Superforecast tends to be more accurate, especially for locations with a complex topography and local thermal effects. The arrows point in the direction in which the wind is blowing.Check the Superforecast for Alcatraz Island, San Francisco Bay when you search for the best travel destinations for your kiteboarding, windsurfing or sailing vacations in United States of America. Or use the Superforecast to find the wind speed today in Alcatraz Island, San Francisco Bay or to have a look at the wind direction tomorrow at Alcatraz Island, San Francisco Bay.
Severe Weather Warnings
When a severe weather warning or advisory is provided by the local meteorological institute, we display it as a banner above the wind forecast.The weather warning, for example a high wind warning, can help you prepare for dangerous weather conditions and avoid weather-related risks. The color scale indicates the intensity of the predicted weather event. For more details click or tap on the warning. General information about severe weather warnings can be found in our help section.
Please be aware that severe weather may occur without a prior severe weather warning being reported.
Units
We use knots and degrees Celsius as our default units. These units are often used by sailors, kiters, surfers, windsurfers and paragliders. Use website settings to switch between units and 7 different languages at any time. For converting between wind speed units such as knots, km/h (kilometers per hour), m/s (meters per second), and mph (miles per hour) use our wind speed calculator.