Oak Harbor in Spring
In spring (March, April and May), Oak Harbor sees average daytime highs around 51°F and overnight lows near 47°F, with 10.7 in of precipitation over about 42 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 47°F in early March to 56°F by late May. The sky is clear or mostly clear about 24% of the time across spring, and the air most often feels dry.
Spring is Oak Harbor's 3rd-best season to visit on our travel score. For the whole year in context, see Oak Harbor's year-round climate.
- Avg daytime high
- 51°F
- 3rd-warmest season
- Avg overnight low
- 47°F
- Precipitation
- 10.7 in
- 42 wet days
- Avg wind
- 8 mph
- Travel score
- 2.4
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Oak Harbor in Spring
Over the season highs climb from about 47°F in early March to 56°F by late May.
A typical spring day in Oak Harbor reaches about 51°F and drops to 47°F overnight. The warmest of the three months is May, the coolest March.
Oak Harbor weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 45° / 42° | 6.2 | 18.6 | 1.4 | 8.6 | 0.9 |
| Feb | 46° / 42° | 4.2 | 14.7 | 1.3 | 9.9 | 1.1 |
| Mar | 48° / 44° | 4.8 | 17.9 | 0.3 | 11.6 | 1.5 |
| Apr | 51° / 46° | 3.3 | 14 | 0 | 13.4 | 2.3 |
| May | 55° / 50° | 2.6 | 10.5 | 0 | 14.9 | 3.5 |
| Jun | 58° / 53° | 2.1 | 9.4 | 0 | 15.8 | 4.4 |
| Jul | 62° / 56° | 1.2 | 5.8 | 0 | 15.5 | 6.0 |
| Aug | 62° / 57° | 1.4 | 5.3 | 0 | 14.1 | 6.3 |
| Sep | 59° / 55° | 2.3 | 8.7 | 0 | 12.4 | 5.0 |
| Oct | 54° / 50° | 4.7 | 13.8 | 0 | 10.6 | 3.1 |
| Nov | 49° / 45° | 7.2 | 18.5 | 0.3 | 9 | 1.6 |
| Dec | 45° / 42° | 6.4 | 18.1 | 1.4 | 8.2 | 0.9 |
Cloud cover in Spring
The sky is clear or mostly clear about 24% of the time across spring.
Chance of precipitation in Spring
Oak Harbor gets around 10.7 in of rain and snow over 42 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 8 mph across spring.
Sunrise & sunset in Spring
Daylight runs from about 10 h 42 min in early March to 15 h 30 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 4.4 kWh/m².
Hazard calendar for Oak Harbor
In spring, Oak Harbor overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Oak Harbor's rainy season runs October–April, when most of the year's rain falls.
Is spring a good time to visit Oak Harbor?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a weaker month for outdoor sightseeing in Oak Harbor.
What to pack for Oak Harbor in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Oak Harbor sees daytime highs around 51°F and nights near 47°F. Pack a warm layer and rain gear. Worth having: sun protection. About 42 days see rain.
Sea temperature near Oak Harbor in Spring
The nearest coast averages about 48°F across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 12 mi away) is warmest in August at about 54°F and coldest in February near 46°F.
The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 46 | 46 | 47 | 48 | 50 | 52 | 53 | 54 | 53 | 50 | 49 | 47 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 46 | Bracing |
| Feb | 46 | Bracing |
| Mar | 47 | Bracing |
| Apr | 48 | Bracing |
| May | 50 | Bracing |
| Jun | 52 | Bracing |
| Jul | 53 | Bracing |
| Aug | 54 | Bracing |
| Sep | 53 | Bracing |
| Oct | 50 | Bracing |
| Nov | 49 | Bracing |
| Dec | 47 | Bracing |
UV index in Oak Harbor in Spring
Clear-sky midday UV across spring averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Oak Harbor peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 4 | 5 | 7 | 6 | 8 | 6 | 4 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | Moderate |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Where is Oak Harbor?
Oak Harbor sits at 48.3°N, 122.6°W, 95 ft above sea level, in United States. The nearest listed city is Anacortes, 15 mi away.
Topography around Oak Harbor
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Oak Harbor.
Within 2 miles, the terrain around Oak Harbor has only modest variations in elevation — a maximum elevation change of 354 ft around an average of 89 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 771 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,780 ft.
The land around Oak Harbor is covered by water (29%), trees (28%) and grassland (24%) within 2 miles, water (61%) and trees (23%) within 10 miles, and trees (53%) and water (34%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Oak Harbor (48.2932°, -122.6432°, elevation 95 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.