Lake · California · United States
Thermalito Afterbay
Kite days stay under 30 % in every month.
A kite day has at least 3 hours of 12 to 35 knots (gusts up to 45) between 10:00 and 19:00, in daylight. Percentages are the share of such days in each month, counted over 9 years.
- Prime 60 % and more
- Good 40 to 59 %
- Possible 20 to 39 %
- Off under 20 %
- No data hatched
- Ringed: this month
Prime also needs a good month in at least 7 of the 9 years, so one freak year cannot make a month Prime. A month with 60 %+ but fewer good years shows as Good.
Confidence lowLake or river spot: global weather models underestimate local thermal winds here.
Month by month
- Kite days
- 8 % Offabout 3 of 31 days
- Too light, kiteable, too strong
- Too light 92 %
- Kiteable 8 %
- Too strong 0 %
- Daylight
- 11.2 h
- Air
- 27 °Cdaily maximum, 24 °C during kite hours
- Rain
- 3 of 31with 1 mm or more
- In one sentence
In October, Thermalito Afterbay averaged 3 kite days out of 31 (8 %).
| Kite days% of days | 9 | 14 | 12 | 9 | 9 | 7 | 0 | 1 | 4 | 8 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Verdictshare plus good years | Off | Off | Off | Off | Off | Off | Off | Off | Off | Off | Off | Off |
| Good yearsof 0, reached 50 % | · | · | · | · | · | · | · | · | · | · | · | · |
| Best hourshour of day, most often 12 to 35 kn | · | 12 to 16 | 10 to 17 | · | · | · | · | · | · | · | · | · |
| Daylighth | 9.7 | 10.7 | 11.9 | 13.2 | 14.3 | 14.9 | 14.7 | 13.7 | 12.5 | 11.2 | 10.1 | 9.4 |
| Air°C, daily maximum | 13 | 15 | 17 | 22 | 28 | 35 | 38 | 37 | 33 | 27 | 18 | 13 |
| Rain days1 mm or more | 10 of 31 | 8 of 28 | 12 of 31 | 6 of 30 | 3 of 31 | 1 of 30 | 0 of 31 | 0 of 31 | 2 of 30 | 3 of 31 | 7 of 30 | 11 of 31 |
- In January, Thermalito Afterbay averaged 3 kite days out of 31 (9 %).
- In February, Thermalito Afterbay averaged 4 kite days out of 28 (14 %).
- In March, Thermalito Afterbay averaged 4 kite days out of 31 (12 %).
- In April, Thermalito Afterbay averaged 3 kite days out of 30 (9 %).
- In May, Thermalito Afterbay averaged 3 kite days out of 31 (9 %).
- In June, Thermalito Afterbay averaged 2 kite days out of 30 (7 %).
- In July, Thermalito Afterbay averaged 0 kite days out of 31 (0 %).
- In August, Thermalito Afterbay averaged 1 kite days out of 31 (1 %).
- In September, Thermalito Afterbay averaged 1 kite days out of 30 (4 %).
- In October, Thermalito Afterbay averaged 3 kite days out of 31 (8 %).
- In November, Thermalito Afterbay averaged 2 kite days out of 30 (7 %).
- In December, Thermalito Afterbay averaged 2 kite days out of 31 (8 %).
Good years are not shown here: this spot has no complete per year values, because the two models drift apart over the years. Trip odds are hidden here: at low confidence the model does not see this spot's wind well enough to count on. Best hours: the hours from 10:00 on when the wind most often reaches 12 to 35 knots. Rain day: 1 mm or more of rain.
Source: ECMWF IFS 9 km via Open-Meteo, hourly model wind, 2017 to 2025; water temperature 2023 to 2025. How we count kite days and trip odds
Trip odds at Thermalito Afterbay
Trip odds are hidden here: at low confidence the model does not see this spot's wind well enough to count on.
How the wind behaves
In February, the windiest month
- Too light 86 %
- Kiteable 14 %
- Too strong 0 %
Too light on 86 %, kiteable on 14 %, too strong on 0 % of days.
Best hours: 12:00 to 16:00, when the wind is most often 12 to 35 knots.
Share of kite days by wind direction, 16 sectors
Wind direction varies, most often SSE (158°).
Kitesurfing at Thermalito Afterbay: quick answers
When is the best time to kitesurf at Thermalito Afterbay?
Thermalito Afterbay rarely gets kiteable wind in the model data: every month stays under 20 % kite days from 2017 to 2025.
Is Thermalito Afterbay windy in October?
Rarely. 8 % of days in October were kite days from 2017 to 2025, about 3 days in a typical October.
How many kite days does Thermalito Afterbay get in a year?
About 27 days a year were kite days from 2017 to 2025, out of 365. A kite day has at least 3 hours of 12 to 35 kn model wind between 10:00 and 19:00 in daylight, with gusts up to 45 kn.
Live forecast
The numbers above are long term averages. The forecast shows the next days.
Live forecast from Windy
The forecast map for Thermalito Afterbay comes from windy.com (Windyty SE, Prague, Czech Republic) and opens right here on this page. Once you load it, your browser contacts Windy, which receives your IP address and may set its own cookies. Nothing is loaded before you click.
Spot facts
- Region
- California
- Country
- United States
- Water body
- Lake, from Natural Earth map data
- Nearest airport
- Sacramento International Airport (SMF), 89 km straight line. Flights are not sold here; this is for planning only.
- Time zone
- UTC-07:00 in October
- Coordinates
- 39.4964, -121.6739
- Model
- ECMWF IFS 9 km via Open-Meteo, hourly
Conditions, checked against kite guides
Water state, flat areas, waves and whether schools teach here, from kite sources, not from satellite images.
Not yet checked against kite guides. We research spot conditions one by one and show only what a kite source says.
Nearby kite spots in California
Kite days in October, % of days
- Sherman Island Kite Launch
United States · 3 points fewer kite days than Thermalito Afterbay in October
5 %Kite days by month at Sherman Island Kite Launch: Jan 6 %, Feb 13 %, Mar 12 %, Apr 12 %, May 28 %, Jun 37 %, Jul 33 %, Aug 20 %, Sep 9 %, Oct 5 %, Nov 3 %, Dec 3 % - Berkeley Marina Kite Launch
United States · 1 point more kite days than Thermalito Afterbay in October
9 %Kite days by month at Berkeley Marina Kite Launch: Jan 13 %, Feb 22 %, Mar 25 %, Apr 26 %, May 44 %, Jun 48 %, Jul 39 %, Aug 32 %, Sep 15 %, Oct 9 %, Nov 7 %, Dec 11 % - Stinson Beach
United States · 24 points more kite days than Thermalito Afterbay in October
32 %Kite days by month at Stinson Beach: Jan 30 %, Feb 48 %, Mar 52 %, Apr 64 %, May 70 %, Jun 68 %, Jul 57 %, Aug 56 %, Sep 48 %, Oct 32 %, Nov 26 %, Dec 32 % - Alameda Beach
United States · same kite days as Thermalito Afterbay in October
8 %Kite days by month at Alameda Beach: Jan 15 %, Feb 30 %, Mar 29 %, Apr 39 %, May 48 %, Jun 44 %, Jul 19 %, Aug 19 %, Sep 14 %, Oct 8 %, Nov 10 %, Dec 15 % - Crissy Fields
United States · 3 points more kite days than Thermalito Afterbay in October
11 %Kite days by month at Crissy Fields: Jan 14 %, Feb 24 %, Mar 30 %, Apr 39 %, May 60 %, Jun 69 %, Jul 60 %, Aug 51 %, Sep 34 %, Oct 11 %, Nov 10 %, Dec 13 % - Ocean Beach
United States · 31 points more kite days than Thermalito Afterbay in October
39 %Kite days by month at Ocean Beach: Jan 27 %, Feb 43 %, Mar 56 %, Apr 72 %, May 88 %, Jun 95 %, Jul 95 %, Aug 91 %, Sep 72 %, Oct 39 %, Nov 22 %, Dec 27 % - 3rd Ave
United States · 14 points more kite days than Thermalito Afterbay in October
22 %Kite days by month at 3rd Ave: Jan 10 %, Feb 29 %, Mar 35 %, Apr 57 %, May 77 %, Jun 83 %, Jul 78 %, Aug 68 %, Sep 48 %, Oct 22 %, Nov 11 %, Dec 10 % - Half Moon Bay
United States · 15 points more kite days than Thermalito Afterbay in October
23 %Kite days by month at Half Moon Bay: Jan 30 %, Feb 41 %, Mar 43 %, Apr 44 %, May 42 %, Jun 32 %, Jul 10 %, Aug 8 %, Sep 14 %, Oct 23 %, Nov 24 %, Dec 31 %
Plan your trip
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kiteCOMPASS · method k3h-10to19-v1 · 2017 to 2025
Model wind: ECMWF IFS 9 km via Open-Meteo, hourly, 2017 to 2025. Water temperature: 2023 to 2025. Kite day: at least 3 hours of 12 to 35 kn model wind between 10:00 and 19:00 in daylight, with gusts up to 45 kn. Confidence: low.
Cite this
In October, 8 % of days at Thermalito Afterbay met the kiteCOMPASS kite day rule: at least 3 hours of 12 to 35 kn model wind between 10:00 and 19:00 in daylight, with gusts up to 45 kn (ECMWF IFS 9 km via Open-Meteo, hourly, 2017 to 2025). https://kitecompass.app/spot/thermalito-afterbay
Numbers on this page are free to reuse under CC BY 4.0: name kiteCOMPASS and link to this page.