Upper Emerald Lake

San Mateo County, CA

GOConfidence · Low
Best bite window
The highlighted window has passed. This read is still based on the latest cached weather; use the 7-Day forecast below for the next window.
Main reason
dry conditions across the window

GO on Upper Emerald Lake — light winds and rising pressure after a passing system for this window. Weather-only read (no on-water history calibrating this yet).

Next forecast window
GO

Tue · Oct 27, 4 AM → 8 AM (America/Los_Angeles)

Full read

The latest cached fishing-weather read for Upper Emerald Lake in San Mateo County, CA is GO. Its highlighted window has passed, so use the 7-day forecast below for the next available window. The main factor in its favor was dry conditions across the window. Its cached forecast evidence included wind near 6 mph out of the west, gusting to 16 mph; surface pressure near 1003 hPa on a rising trend; 0.00 inches of rain; and air temperature near 52 °F with clear dominant. Confidence in this cached read is low; it was generated October 26, 2026, 9:15 AM UTC, and reads refresh on a daily cadence. This is a weather-only read built from forecast weather; it does not yet use on-water reports, and confidence is capped until local water data or feedback exists.

UPDATED October 26, 2026, 9:15 AM UTCBUCKET 2026-10-26ENGINE 0.7.0

Conditions at a glance

Wind
6mph

W · gust 16

Rain / Weather
0in

Clear

Temp
52°F

11°C · hum 84%

Pressure
29.62inHg

Rising

7-Day Fishing Forecast

One read per day — the bite call, the window, the weather behind it

  1. Mon · Oct 26
    Window passed
    GO
    Dry conditions across the window
    66° / 52°F
    6 mph · Wgust 22
    0.00 in
    → +0.8 hPa
  2. Tue · Oct 27
    4 AM → 8 AM
    GO
    Dry conditions across the window
    63° / 50°F
    6 mph · Wgust 25
    0.00 in
    ↓ -3.8 hPa
  3. Wed · Oct 28
    8 AM → 12 PM
    GO
    Dry conditions across the window
    68° / 54°F
    3 mph · NEgust 7
    0.00 in
    ↓ -1.3 hPa
  4. Thu · Oct 29
    4 AM → 8 AM
    GO
    Dry conditions across the window
    68° / 55°F
    3 mph · SEgust 9
    0.00 in
    ↓ -2.1 hPa
  5. Fri · Oct 30
    4 AM → 8 AM
    GO
    Dry conditions across the window
    61° / 54°F
    6 mph · SWgust 12
    0.00 in
    ↑ +4.4 hPa
  6. Sat · Oct 31
    4 AM → 8 AM
    GO
    Dry conditions across the window
    63° / 52°F
    4 mph · Wgust 10
    0.00 in
    → +0.2 hPa
  7. Sun · Nov 1
    6 AM → 10 AM
    GO
    Dry conditions across the window
    64° / 52°F
    4 mph · NEgust 5
    0.00 in
    ↓ -0.5 hPa

Last 3 days

Recent context — what just happened

Pressure
Steady
+4.0 hPa over 72h
Rain
Dry stretch
0.00 in totallast 72h
Wind
Calm wind
5 mph · gust 17 · W
Temperature
Warmer
+0.7°F over 72h73–48°F range

Weather-only read. Confidence is capped until local water data or feedback exists.

Nearby waters

Weather data by Open-Meteo — CC BY 4.0. Fishing Weather derives the fishing read.

Upper Emerald Lake Fishing Forecast - 7-Day Windows (CA)