Marine Weather and Tide Forecast for Boise City, ID
 | Sunrise 7:47 AM Sunset 7:57 PM Moonrise 7:20 AM Moonset 9:29 PM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
7 Day Forecast for Marine Location Near Boise City, ID
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FXUS65 KBOI 200916 AFDBOI
Area Forecast Discussion National Weather Service Boise ID 316 AM MDT Fri Mar 20 2026
KEY MESSAGES
- Last day of record high temperatures today, with much cooler temperatures this weekend.
- Breezy conditions and low relative humidity in the single digits will create fire danger concerns for areas near the NV border this afternoon.
- A cold frontal passage tomorrow afternoon will bring cooler temperatures, mountain precipitation, and breezy westerly winds through the evening.
SHORT TERM /Through Sunday Night/
The last day of record highs will occur today as high pressure centers over the Desert Southwest. A cold front will move through early Saturday, bringing a 10-20 degree temperature drop, breezy westerly winds, and light mountain showers. Showers will occur over the northern portions of Valley/Baker County, with only a 5-10% chance of any precipitation further south.
Snow levels will start around 8000 feet, briefly dropping to 6000 feet as showers taper off. The coolest temperatures are expected on Sunday, with valley highs in the upper 50s to low 60s.
LONG TERM /Monday through Friday/
Zonal flow aloft on Monday will bring another day of near normal temperatures, with dry conditions. A ridge of high pressure will then build in for Tuesday, bringing a short lived return to high temperatures. Valley highs will be in the mid 70s, with mountain high temps in the 50s. A trough off the British Columbia coast will then dig into the Pacific Northwest, shifting the region under southwest flow with a cold frontal passage on Wednesday. This will bring colder temperatures and increased chances of precipitation (30-50%), primarily over high terrain. Precipitation will taper off on Thursday, with cooler temperatures lingering under zonal flow, then another ridge of high pressure will build over the region by late Friday. This will likely bring a return to warm and dry conditions for the weekend.
AVIATION /06Z Friday through Saturday/
Issued 1215 AM MDT FRI MAR 20 2026 VFR with high clouds. Surface winds: variable up to 10 kt through the morning. Then, SE-SW 5-15 kt in the afternoon, with gusts to 20- 25 kt west and south of Snake Plain. Winds aloft at 10 kft MSL: W-SW 15-30 kt.
KBOI...VFR. Surface winds: SE 5-10 kt.
Weekend Outlook...A cold front will bring gusty winds and isolated rain showers on Saturday. Localized MVFR-IFR conditions in showers near KMYL/KBKE. VFR Sunday. Surface winds: increasing to W-NW 10-20 kt with gusts to 20-35 kt with cold front Saturday PM. Then, SW-NW 5- 15 kt with afternoon gusts 15-25 kt Sunday.
BOI WATCHES/WARNINGS/ADVISORIES
ID...None.
OR...None.
Area Forecast Discussion National Weather Service Boise ID 316 AM MDT Fri Mar 20 2026
KEY MESSAGES
- Last day of record high temperatures today, with much cooler temperatures this weekend.
- Breezy conditions and low relative humidity in the single digits will create fire danger concerns for areas near the NV border this afternoon.
- A cold frontal passage tomorrow afternoon will bring cooler temperatures, mountain precipitation, and breezy westerly winds through the evening.
SHORT TERM /Through Sunday Night/
The last day of record highs will occur today as high pressure centers over the Desert Southwest. A cold front will move through early Saturday, bringing a 10-20 degree temperature drop, breezy westerly winds, and light mountain showers. Showers will occur over the northern portions of Valley/Baker County, with only a 5-10% chance of any precipitation further south.
Snow levels will start around 8000 feet, briefly dropping to 6000 feet as showers taper off. The coolest temperatures are expected on Sunday, with valley highs in the upper 50s to low 60s.
LONG TERM /Monday through Friday/
Zonal flow aloft on Monday will bring another day of near normal temperatures, with dry conditions. A ridge of high pressure will then build in for Tuesday, bringing a short lived return to high temperatures. Valley highs will be in the mid 70s, with mountain high temps in the 50s. A trough off the British Columbia coast will then dig into the Pacific Northwest, shifting the region under southwest flow with a cold frontal passage on Wednesday. This will bring colder temperatures and increased chances of precipitation (30-50%), primarily over high terrain. Precipitation will taper off on Thursday, with cooler temperatures lingering under zonal flow, then another ridge of high pressure will build over the region by late Friday. This will likely bring a return to warm and dry conditions for the weekend.
AVIATION /06Z Friday through Saturday/
Issued 1215 AM MDT FRI MAR 20 2026 VFR with high clouds. Surface winds: variable up to 10 kt through the morning. Then, SE-SW 5-15 kt in the afternoon, with gusts to 20- 25 kt west and south of Snake Plain. Winds aloft at 10 kft MSL: W-SW 15-30 kt.
KBOI...VFR. Surface winds: SE 5-10 kt.
Weekend Outlook...A cold front will bring gusty winds and isolated rain showers on Saturday. Localized MVFR-IFR conditions in showers near KMYL/KBKE. VFR Sunday. Surface winds: increasing to W-NW 10-20 kt with gusts to 20-35 kt with cold front Saturday PM. Then, SW-NW 5- 15 kt with afternoon gusts 15-25 kt Sunday.
BOI WATCHES/WARNINGS/ADVISORIES
ID...None.
OR...None.
Link to 1 hour of 5 minute data for KBOI
Terminal Aerodrome Forecast (TAF) for KBOI
Wind History Graph: BOI
(wind in knots)
GEOS Local Image of Pacific Northwest
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Boise, ID,
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