Bremerton, Washington Weather
Fog locks the valleys. Day 93 of summer. Read this microseason across nine climate regions →
Bremerton weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 1:10 AM PDT · Open-Meteo
- TodaySep 21Clear——72°48°—
- TuesdaySep 22Overcast13%0.02″65°49°-7°
- WednesdaySep 23Overcast——69°44°+4°
- ThursdaySep 24Showers57%0.46″59°47°-10°
- FridaySep 25Light Showers57%0.36″64°45°+5°
- SaturdaySep 26Overcast——63°45°-1°
- SundaySep 27Overcast12%—68°46°+5°
Air quality now AQI 48 · Good
AQI 48 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.7 µg/m³ (AQI 43) with a 0.94 fine-to-coarse ratio and 1 mph wind — combustion smoke trapped in stagnant air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 7.7 µg/m³ (AQI 43) with a 0.94 fine-to-coarse ratio and 1 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.94
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- —
- Moonset
- 1:08 AM
- In sign
- ♑︎ Capricorn
Fog locks the valleys
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Bremerton at a glance
- Today vs. normal: Today averages 60°F (high 72°F, low 48°F), about the 60°F normal for Sep 21
- Last frost: March 29 (1991–2020 median, NOAA station 4 km away)
- Microseason: Sep 21–25
- Planting calendar: September — harvest tomatoes, peppers, beans, summer squash, winter squash
15-Day Forecast — Bremerton
- Mon72°48°1%
- Tue65°49°13%
- Wed69°44°2%
- Thu59°47°57%
- Fri64°45°57%
- Sat63°45°7%
- Sun68°46°12%
- Mon69°46°10%
- Tue71°48°12%
- Wed71°49°15%
- Thu71°50°22%
- Fri58°48°22%
- Sat60°45°16%
- Sun63°41°19%
- Mon57°41°26%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Bremerton
Interactive wind and temperature map centered on Bremerton — it loads in your browser. Open the full weather map.
Right now in the garden
Late season
As of September 21, the first frost (around November 14) is about 8 weeks away. Frost-tender plants keep producing until then. This city's planting calendar for September: harvest tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Bremerton
Bremerton sits in Kitsap County, where the year’s longest day runs 15h 59m of daylight and its shortest just 8h 26m — a swing of +7h 33m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Seattle, the state’s largest city, lies about 19 miles to the ENE. The nearest town Bremerton tracks is Seattle, roughly 19 miles to the ENE.
Air quality in Bremerton
Air quality in Bremerton’s county has trended cleaner since 2020; its cleanest year on record was 2024 (median AQI 19). See the full air-quality history for Bremerton.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes | lettuce, spinach, radishes |
| May | — | lettuce, peas, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, garlic |
| July | tomatoes, peppers, beans, squash | garlic |
| August | tomatoes, peppers, beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash |
| September | — | tomatoes, peppers, beans, summer squash, winter squash |
| October | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| November | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| December | — | fall brassicas, carrots |
A year in weather
Bremerton peaks at about 66°F in August and bottoms near 40°F in December; December brings the heaviest rain (9.9 inches) and July the least (0.8 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 41° | 9.3″ | 14 |
| February | 42° | 5.8″ | 10 |
| March | 46° | 6.4″ | 12 |
| April | 50° | 3.9″ | 9 |
| May | 56° | 2.4″ | 6 |
| June | 61° | 1.6″ | 5 |
| July | 66° | 0.8″ | 2 |
| August | 66° | 1.1″ | 2 |
| September | 62° | 1.8″ | 5 |
| October | 53° | 5.1″ | 9 |
| November | 45° | 8.8″ | 13 |
| December | 40° | 9.9″ | 14 |
Regional context
Similar climates Gorst, WA, Navy Yard City, WA, Port Orchard, WA
In Bremerton, NOAA NCEI 1991-2020 normals put January near 41°F and July near 66°F — a 24°F seasonal arc — with about 56.9 inches of precipitation over 102 rainy or snowy days.
Cool-season fronts carry Bremerton's rain: December logs 9.9 inches on 13.6 days, against July's 0.8 inches on 2.3 — winter does the heavy lifting in Bremerton. That groups Bremerton with places like Gorst, WA, Navy Yard City, WA and Port Orchard, WA on the same cool-season storm track.
Around March 29, Bremerton sheds its freezing nights — peas, lettuce, spinach, and radishes go into Bremerton's beds. Heat-demanding starts go out a fortnight on in Bremerton, after the soil warms and cold snaps clear. The season ends by November 14 in Bremerton, once hard frosts set back in. That date is a median: Bremerton freezes sooner in half of years.
Similar climates: Gorst, WA, Navy Yard City, WA, Port Orchard, WA, Kitsap Lake, WA, Rocky Point, WA.
Frequently asked
- When does it freeze in Bremerton?
- Frost typically leaves Bremerton by March 29 and returns to Bremerton near November 14.
- What is the rainy season in Bremerton?
- Bremerton sees its heaviest rain in December (around 9.9 inches), part of roughly 57 inches a year.
- What is the warmest month in Bremerton?
- The warmest stretch in Bremerton comes in August, around 66°F on average.
- What is the coldest month in Bremerton?
- On average December is the chilliest month in Bremerton, about 40°F.
- When can I start a vegetable garden in Bremerton?
- Bremerton's last frost (March 29) cues hardy greens; in Bremerton, hold heat-lovers two weeks past.
- How many rainy days does Bremerton get?
- Expect roughly 102 wet days a year in Bremerton.
- What hardiness zone is Bremerton?
- Bremerton's hardiness zone tracks its winter low; with December near 40°F, check the USDA ZIP map for the exact zone.
- What is the 10-day forecast for Bremerton?
- Bremerton's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Bremerton?
- See this week's day-by-day rain chances for Bremerton in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Bremerton?
- Current conditions for Bremerton and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Bremerton forecast updated?
- The Bremerton forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Bremerton?
- Today's sunrise and sunset times for Bremerton are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Bremerton?
- The next few days in Bremerton's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Bremerton sits at 47.5°N; its climate zone is warm-summer Mediterranean (Köppen approximation).
ZIP codes in Bremerton
- 98310
- 98311
- 98312
- 98314
- 98337