Outlook
When the sun is expected at the beach, today through five days out.
Today Oct 26
Sunny early. 78% odds the beach is in sun by 9. About 6 hours of sun between 10 and 4.
Solid bars are what the sensor recorded. Past now: the odds of sun.
Tuesday Oct 27 · 1 day out
98% burns off
Sunny early. Good odds it is clear by 9am.
About 6 hours of sun 10 to 4, give or take 1 hour · sun by noon 96% · 56–73° · timing at this range is usually within 55 min.
Wednesday Oct 28 · 2 days out
95% burns off
Sun around 9:10am, most likely between 9:00–11:20am.
About 4½ hours of sun 10 to 4, give or take 1½ hours · sun by noon 90% · 65–74° · timing at this range is usually within 60 min.
Thursday Oct 29 · 3 days out
95% burns off
Sun around 9:25am, most likely between 9:00–11:30am.
About 4½ hours of sun 10 to 4, give or take 1½ hours · sun by noon 89% · 64–74° · timing at this range is usually within 60 min.
Friday Oct 30 · 4 days out
19% clears at all
Overcast. Cloud at mid levels all day, above the marine layer. That does not burn off. Days like this cleared 19% of the time.
66–69°. This far out it is a lean, not a call.
Saturday Oct 31 · 5 days out
94% burns off
Sunny early. Good odds it is clear by 9am.
About 4 hours of sun 10 to 4, give or take 1½ hours · sun by noon 91% · 65–72° · timing at this range is usually within 65 min. This far out it is a lean, not a call.
How far ahead is it worth reading?
- The 9:00am call37 min
- 1 day out57 min
- 2 days out59 min
- 3 days out60 min
- 4 days out61 min
- 5 days out65 min
Dark bar: how far off the timing typically is. Pale bar: how far off you would be just guessing the seasonal average (57–68 min). The closer the two, the less the forecast is telling you. Measured over 895 days, each scored by a model that had never seen that year.
Reading these
Each strip runs 6am to 6pm. The taller the bar, the better the odds the beach is in sun at that time. The ring marks the single most likely clearing time and the bracket its likely window. Future days combine the HRRR weather model's cloud forecast for Cardiff with what the beach sensors recorded over the last few days. When that model has rain or a deck of cloud at mid levels, the day is called as weather rather than marine layer, and no burn-off time is given. Hours of sun are counted between 10am and 4pm.