HallevannetWhen to Go
Best Time to Visit Hallevannet
Best in late spring through summer for accessible weather and daylight; shoulder seasons offer quieter views.
Summer
June-August · 12-22°C
Calmer weather and long daylight; good for picnics and short swims.
Late spring/early autumn
May, September · 8-16°C
Less crowded; dramatic skies and migrating birds in spring.
Weather & Climate near Hallevannet
Climate
Hallevannet's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -3°C to 21°C. Abundant rainfall (1021 mm/year), wettest in October.
Air Quality:
AQI 23
Good
Best Time to Visit
JuneJulyAugust
Temperature & Rainfall
Temperature Range
29°
Warmest Month
-15°
Coldest Month
Monthly Conditions
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Poor | -3° - 0° | -7° | 85 mm | overcast | 92% | 4.5 m/s | 0.0 low | 6.7h |
| February | Poor | -3° - 1° | -6° | 57 mm | overcast | 92% | 4.3 m/s | 0.1 low | 9.0h |
| March | Poor | -1° - 4° | -2° | 75 mm | overcast | 87% | 4.2 m/s | 0.3 low | 11.6h |
| April | Acceptable | 3° - 9° | 3° | 54 mm | overcast | 82% | 4.0 m/s | 0.7 moderate | 14.3h |
| May | Acceptable | 9° - 15° | 12° | 62 mm | overcast | 79% | 4.1 m/s | 1.0 high | 16.8h |
| June | Good | 12° - 19° | 16° | 68 mm | overcast | 78% | 4.0 m/s | 1.4 high | 18.2h |
| July | Good | 15° - 21° | 18° | 76 mm | overcast | 80% | 3.8 m/s | 1.3 high | 17.5h |
| August | Good | 14° - 20° | 17° | 95 mm | overcast | 82% | 3.8 m/s | 0.9 moderate | 15.3h |
| September | Good | 10° - 15° | 12° | 117 mm | overcast | 84% | 4.3 m/s | 0.5 low | 12.6h |
| October | Poor | 5° - 10° | 5° | 127 mm | overcast | 87% | 4.3 m/s | 0.1 low | 10.0h |
| November | Poor | 1° - 4° | -1° | 119 mm | overcast | 90% | 4.4 m/s | 0.0 low | 7.4h |
| December | Poor | -3° - 1° | -6° | 86 mm | overcast | 92% | 4.3 m/s | 0.0 low | 5.9h |
Getting There & Around
How to Get to Hallevannet
Drive from Tønsberg or Sandefjord on regional roads toward local Hallevannet signs; most visitors find parking near the main access point and walk the short shoreline paths. Regional buses to nearby towns can be used, but a car is the simplest option.
Tips for Visiting Hallevannet
- If visiting by car, approach via route E18 and use local signage toward Hallevannet; roadside parking is limited so arrive early on weekends.
- Bring a waterproof jacket in spring and autumn-coastal weather can change quickly even near Oslofjord.
- Photographers should try golden hour: the low sun slants across the water and illuminates the reeds.