Newcastle, WA Weather Forecast
Local 7-day forecast
Patchy Frost then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Newcastle, WA in one place.
Patchy frost before 8am. Mostly sunny. High near 56, with temperatures falling to around 54 in the afternoon. South wind around 6 mph.
Local Weather Overview
This forecast page for Newcastle, WA 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: Apr 15, 2026 5:03 PM PDT.
The active forecast window currently covers Apr 16 to Apr 21, 2026 for Newcastle, WA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 16 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 5:03 PM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in Newcastle
Monday looks like the warmest upcoming period in Newcastle at 68 degrees F.
Thursday Night is the coolest period ahead with temperatures near 40 degrees F.
The strongest winds are forecast for Monday at about 3 to 7 mph N.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 5:03 PM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- SEW
- Radar station
- KATX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 40. South wind around 6 mph.
Mostly sunny, with a high near 57. West wind around 5 mph.
Mostly cloudy, with a low around 42.
Mostly cloudy, with a high near 65.
A slight chance of rain after 5am. Mostly cloudy, with a low around 47.
A slight chance of rain before 5pm. Mostly cloudy, with a high near 66.
Mostly cloudy, with a low around 48.
Partly sunny, with a high near 68.
Mostly cloudy, with a low around 50.
A chance of rain after 11am. Partly sunny, with a high near 64.
A chance of rain. Mostly cloudy, with a low around 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 16
|
Patchy Frost then Mostly Sunny
|
56°F |
6 mph
S
|
|
Thursday Night
Apr 16
|
Partly Cloudy
|
40°F |
6 mph
S
|
|
Friday
Apr 17
|
Mostly Sunny
|
57°F |
5 mph
W
|
|
Friday Night
Apr 17
|
Mostly Cloudy
|
42°F |
5 mph
NE
|
|
Saturday
Apr 18
|
Mostly Cloudy
|
65°F |
3 mph
S
|
|
Saturday Night
Apr 18
|
Mostly Cloudy then Slight Chance Light Rain
|
47°F |
3 mph
NNE
|
|
Sunday
Apr 19
|
Slight Chance Light Rain
|
66°F |
6 mph
NNE
|
|
Sunday Night
Apr 19
|
Mostly Cloudy
|
48°F |
6 mph
N
|
|
Monday
Apr 20
|
Partly Sunny
|
68°F |
3 to 7 mph
N
|
|
Monday Night
Apr 20
|
Mostly Cloudy
|
50°F |
7 mph
NNE
|
|
Tuesday
Apr 21
|
Chance Light Rain
|
64°F |
7 mph
SSW
|
|
Tuesday Night
Apr 21
|
Chance Light Rain
|
49°F |
7 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Newcastle.
