Newcastle, CA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Newcastle, CA in one place.
Sunny, with a high near 90. North northwest wind 2 to 6 mph.
Local Weather Overview
This forecast page for Newcastle, CA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 14, 2026 10:55 PM PDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Newcastle, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 14, 2026 10:55 PM PDT
- Forecast office
- STO
- Source
- NOAA / NWS
Daily Outlook
This Week in Newcastle
Thursday looks like the warmest upcoming period in Newcastle at 90 degrees F.
Monday Night is the coolest period ahead with temperatures near 49 degrees F.
The strongest winds are forecast for Monday at about 5 to 9 mph S.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 10:55 PM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- STO
- Radar station
- KDAX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Clear. Low around 59, with temperatures rising to around 62 overnight. Northeast wind around 6 mph.
Sunny, with a high near 87. Southeast wind around 5 mph.
Clear, with a low around 59. East wind around 5 mph.
Sunny, with a high near 88.
Clear, with a low around 58.
Sunny, with a high near 83.
Mostly clear, with a low around 50.
Sunny, with a high near 71.
A slight chance of rain after 5am. Partly cloudy, with a low around 49.
A slight chance of rain. Mostly sunny, with a high near 69.
A slight chance of rain before 5am. Partly cloudy, with a low around 50.
Sunny, with a high near 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Sunny
|
90°F |
2 to 6 mph
NNW
|
|
Thursday Night
Oct 15
|
Clear
|
59°F |
6 mph
NE
|
|
Friday
Oct 16
|
Sunny
|
87°F |
5 mph
SE
|
|
Friday Night
Oct 16
|
Clear
|
59°F |
5 mph
E
|
|
Saturday
Oct 17
|
Sunny
|
88°F |
5 mph
W
|
|
Saturday Night
Oct 17
|
Clear
|
58°F |
6 mph
ESE
|
|
Sunday
Oct 18
|
Sunny
|
83°F |
7 mph
SSE
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
50°F |
7 mph
SSE
|
|
Monday
Oct 19
|
Sunny
|
71°F |
5 to 9 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy then Slight Chance Light Rain
|
49°F |
5 mph
SE
|
|
Tuesday
Oct 20
|
Slight Chance Light Rain
|
69°F |
5 mph
SSW
|
|
Tuesday Night
Oct 20
|
Slight Chance Light Rain
|
50°F |
5 mph
NE
|
|
Wednesday
Oct 21
|
Sunny
|
72°F |
6 mph
NNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Newcastle.