Arcata, CA Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for Arcata, Humboldt County, California.
Updated Jul 29, 2026, 1:42 PM local time · Radar refreshes every 5 minutes
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Arcata
63°F
Wind 4 mph
Humidity 89%
Cloud cover 100%
UV index 7
Alerts 1
Active alerts (1)
Beach Hazards StatementModerate
Southwestern Humboldt; Coastal Mendocino
Until Jul 30, 2026, 12:00 AM
Full details
* WHAT...Increased threat of sneaker waves expected. * WHERE...Southwestern Humboldt and Coastal Mendocino Counties. * WHEN...Through Wednesday afternoon. . * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. Don't be fooled by an ocean that looks calm. There can be 30 minutes of small waves before a sneaker wave strikes. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean.
Arcata weather radar
Light
Heavy
Next 24 hours
Now
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62°F
2 PM
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63°F
3 PM
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65°F
4 PM
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65°F
5 PM
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65°F
6 PM
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64°F
7 PM
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62°F
8 PM
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60°F
9 PM
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57°F
10 PM
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56°F
11 PM
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55°F
12 AM
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54°F
1 AM
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53°F
2 AM
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52°F
3 AM
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51°F
4 AM
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51°F
5 AM
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53°F
6 AM
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54°F
7 AM
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54°F
8 AM
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56°F
9 AM
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58°F
10 AM
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61°F
11 AM
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62°F
12 PM
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64°F
7-day forecast
Today
Jul 29
🌫️
65°F
55°F
1%
Thu
Jul 30
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66°F
51°F
Fri
Jul 31
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77°F
51°F
Sat
Aug 1
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74°F
53°F
1%
Sun
Aug 2
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72°F
54°F
1%
Mon
Aug 3
☀️
77°F
54°F
Tue
Aug 4
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81°F
59°F
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Alerts are relayed from the National Weather Service and may lag
the official source. In a life-threatening situation always follow
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broadcasts.