Massachusetts · river
Stony Brook, Unnamed Tributary 1, near Waltham
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: Tue, 29 Sep 2026 18:45:00 GMT.
River observation: Tue, 29 Sep 2026 18:40:00 GMT.
Page checked: Tue, 29 Sep 2026 18:59:24 GMT. Readings older than one hour are not used for the current score.
Wind
6 mph
gusting to 10 mph
Air temp
65°F
2% chance of rain
River flow
0.74 cfs
normal for this date
Weather outlook
Wednesday · 100
Tue
95
65°
Wed
100
69°
Best
Thu
75
79°
Fri
61
87°
Sat
79
69°
Sun
97
61°
Mon
79
66°
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) |
|---|---|---|
| 2p | 6 | 11 |
| 3p | 5 | 10 |
| 4p | 5 | 9 |
| 5p | 5 | 10 |
| 6p | 4 | 10 |
| 7p | 3 | 6 |
| 8p | 3 | 6 |
| 9p | 3 | 5 |
| 10p | 3 | 7 |
| 11p | 4 | 8 |
| 12a | 3 | 7 |
| 1a | 3 | 7 |
Is this flow normal for September 29?
Today's 0.74 cfs is 124% above the median for this date — which counts as normal water here.
The median flow on this date is 0 cfs, across 24 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 — 6 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 01104455
Full hydrograph, historical flows, and station metadata
Nearby water
- Stony Brook at Rt 20 at Walthamunder 1 mi
- Stony Brook Unnamed Tributary 2 near Weston Stationunder 1 mi
- Stony Brook Reservoir at Dam near Waltham1 mi
- Stony Brook Res., Unnamed Tributary 1, near Weston1 mi
- Stony Brook at Viles Street, near Weston1 mi
- Hobbs Bk below Cambridge Reservoir near Kendall Green2 mi