California · river
Pilarcitos Creek A Half Moon Bay
USGS monitoring location. Launch access and paddling suitability have not been verified.
Weather comparison · not a safety rating
Favorable weather
Weather score out of 100
Weather only. This is a monitoring station, not a verified launch. Access, hazards and suitable flow are unknown.
Weather observation: Thu, 22 Oct 2026 01:30:00 GMT.
River observation: Thu, 22 Oct 2026 01:00:00 GMT.
Page checked: Thu, 22 Oct 2026 01:41:21 GMT. Readings older than one hour are not used for the current score.
Wind
1 mph
gusting to 10 mph
Air temp
63°F
20% chance of rain
River flow
2.83 cfs
high for this date
Weather outlook
Wednesday · 100
Wed
100
68°
Best
Thu
74
63°
Fri
88
67°
Sat
100
74°
Sun
100
75°
Mon
100
78°
Tue
100
74°
Compares forecast wind, air temperature and rain. Does not assess river flow, swell, currents, water temperature or launch access. All times are local to this location.
Wind, next 12 hours
mph| Hour | Wind (mph) | Gusts (mph) |
|---|---|---|
| 6p | 3 | 11 |
| 7p | 0 | 8 |
| 8p | 4 | 4 |
| 9p | 2 | 3 |
| 10p | 4 | 6 |
| 11p | 4 | 4 |
| 12a | 5 | 6 |
| 1a | 4 | 6 |
| 2a | 5 | 5 |
| 3a | 2 | 5 |
| 4a | 3 | 8 |
| 5a | 5 | 11 |
Is this flow normal for October 22?
Today's 2.83 cfs is 102% above the median for this date — which counts as high water here.
The median flow on this date is 1 cfs, across 59 years of USGS record at this gauge. Whether that is runnable depends on the stretch — this is context, not a recommendation.
Why this score
- Wind — 1 mph — light wind at the forecast location±0
We don't have launch notes for this one
This page is built from the USGS gauge at this location, and uses available public readings. We haven't verified where to put in, what the hazards are, or whether this stretch is legal or sensible to paddle. We'd rather say that than invent it. The links below are where to find out.
We also don't have a verified safe-flow range here, so the Paddle Score reflects weather only. Judge the flow number against local knowledge, not against our score.
Do your own homework
We show you live conditions. For local knowledge — where to put in, what the hazards are, whether it's worth the drive — here's where paddlers actually talk about this water. We don't vet these sources; check the dates and judge for yourself.
- Paddler discussion on Reddit
Trip reports and local warnings, straight from the source
- Search American Whitewater
Rapid classifications and gauge-linked run descriptions
- Satellite view and access roads
Check parking, put-ins, and what the banks actually look like
- Video from this water
The fastest way to see the character of a run before you drive
- USGS gauge 11162630
Full hydrograph, historical flows, and station metadata
Nearby water
- Pilarcitos Creek below Stone Dam near Hillsborough4 mi
- Pilarcitos Creek above Stone Dam near Hillsborough5 mi
- Pilarcitos Creek below Spillway near Hillsborough6 mi
- San Mateo Creek below Lo Crystal Sp Reservoir near San Mateo6 mi
- San Mateo Creek below Junction Box A Dam1 near Hillsborough6 mi
- San Mateo Creek above Junction Box A Dam1 near Hillsborough6 mi