Solid bars are what the sensor recorded. Past now: the odds of sun.
- Beach
- 64° · high 77°
- Wind
- Calm
Yesterday in sun by 9am, so there was no call to make.
What it’s reading
- Weather modelThe high-resolution weather model has sun breaking through around 9am.
- Time of yearThe sun is strong this time of year, which helps burn through.
- Recent patternThe last few days cleared well, and marine-layer patterns tend to repeat.
Where the cloud edge is the stations
Sun’s too low for the sensors to tell yet.
The week full outlook
- Tueby 9am98%
- Wed~9:10am95%
- Thu~9:25am95%
- Frigray19%
- Satby 9am94%
Each bar is 6am to 6pm; gold is likely sun. Then when the sun is expected, and the chance it burns off at all. Timing is typically within about 55 minutes a day out, and looser further on.
The record day by day
Of the last 7 calls, 4 landed in their window, and 3 missed.
Tall is in the window, half is within an hour, a stub is a miss, a dot is a day already in sun at 9, which is not counted. 12 of these are replays: what the model would have called, from a version that had not seen that year. Over the whole record, on mornings still under cloud at 9am, the call’s average miss is 51 minutes; guessing the seasonal average misses by 76.
Gloom season 2026every year
6 of 90 days never cleared. On the rest the sun typically came out around 9:55am. Over the whole season the beach averaged 4.5 hours of sun between 10 and 4. That makes 2026 the sunniest of the three seasons on record: 6 gray days, against 20 in 2024 and 19 in 2025.
Each column is a day, May 1 to July 31. Time runs down it from 6am to 6pm: gray while the beach was under cloud, gold while it was in sun. A column that is gray top to bottom never cleared.
How this works
Three weather stations run from the sand to eight miles inland. Each measures how much sunlight is getting through, judged against what that sensor reads under a clear sky at that exact sun angle. That is a direct read on how thick the marine layer is, and where its edge sits.
Before 9am you see an early read that updates on the hour. At 9:00 the model commits to a time, a window and the odds. That call is stored and never edited. After it, the page follows the sky and keeps score.
Not every gray day is marine layer. When the weather model has rain, or a deck of cloud at mid levels above where the marine layer sits, the page says that instead of quoting a burn-off time: those days stayed gray about four times in five.
Hours of sun are counted between 10am and 4pm and are usually within about an hour. Whether cloud comes back in the afternoon is given as a lean, not a time: it is the hardest part of the day to call.