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Sandefjord in September 2026: weather, temperatures and activities

Do you want to visit Sandefjord in September 2026? Discover the usual weather at this time of year, average temperatures, the risk of rain, possible activities, and our opinion on whether September is a good month to travel to Sandefjord, Norway.

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Is it worth visiting Sandefjord in September?

Check your ideal travel criteria and see if the month of September suits your plans to go to Sandefjord.
What matters most?
Sandefjord in September 2026: weather, temperatures and activities

Page summary

Sandefjord in September in summary
Favourable weather
Min 12°C Max 16°C 78 mm 5 day(s) 81% 41% 18°C 11.2 h/day
Best activities in September
Cultural visits and heritageGastronomy
Practical guidelines
Moderate crowds Moderate prices 05:48 18:39
Hourly weather

Average weather in Sandefjord in September 2026

Favourable weather

The weather in Sandefjord in September 2026 is based on statistical data from previous years in September. This allows you to forecast the weather in September 2026. Check the hourly statistics (6:00, 9:00, 12:00, 15:00, 18:00, 21:00, 0:00 and 3:00), with the associated average temperature, for the whole month, and also, by navigating the tabs, for the beginning, middle and end of the month.

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Climate

Climate of Sandefjord in September

Temperatures, precipitation and monthly trends help to better understand the climate in Sandefjord in September.

Temperatures and rain in Sandefjord in September

Average daily weather

Temperatures and rain day by day in September.
Minimal Average Maximums Average rainfall

Monthly temperatures

The month of September is highlighted to compare it quickly with the rest of the year.
Minimal Average Maximums

Monthly precipitation

The bar for the month under study is highlighted.
Average rainfall

About the climate in Sandefjord in September

Seasonal normals

Seasonal normals of Sandefjord in September

Check the seasonal normals in Sandefjord in September and compare the weather with the previous month and the following month (or the months of your choice by selecting months in the form below): temperatures, wind, rain, humidity, climate rating...

Last updated: 12/01/2026
Reference period for normals: January 2009 - December 2025
Month analyzed
September
Weather data August September October
Outside temperature
Average temperature 16.9°C 13.9°C 9.2°C
Maximum temperature 18.5°C 15.7°C 10.5°C
Minimum temperature 15.4°C 12.1°C 7.9°C
Record maximum temperature 23.0°C
(2009)
23.0°C
(2021)
17.0°C
(2011)
Record low temperature 10.0°C
(2010)
4.0°C
(2009)
1.0°C
(2009)
Number of days at +30° 0 day(s)
(0%)
0 day(s)
(0%)
0 day(s)
(0%)
Number of days at +18° 22 day(s)
(71%)
6 day(s)
(20%)
0 day(s)
(0%)
Number of days below 0° 0 day(s)
(0%)
0 day(s)
(0%)
0 day(s)
(0%)
Sea temperature
Sea temperature (average) 18.5°C 15.9°C 12.2°C
Sea temperature (minimum) 15.9°C 13.5°C 9.3°C
Sea temperature (maximum) 20.9°C 18.2°C 14.9°C
Wind
Wind speed 22 km/h 23 km/h 25 km/h
Wind temperature 14.8°C 10.5°C 4.9°C
Precipitation (rain)
Precipitation 102.1 mm 78.5 mm 81.2 mm
Number of days with precipitation 17 day(s)
(55%)
13 day(s)
(43%)
15 day(s)
(48%)
Number of days with significant precipitation (greater than 5 mm) 7 day(s)
(22%)
5 day(s)
(16%)
5 day(s)
(18%)
Record precipitation in one day 29.2 mm
(2014)
32.4 mm
(2019)
29.6 mm
(2017)
Other weather data
Humidity 81% 81% 82%
Visibility 9.5 km 9.5 km 9.1 km
Cloud cover 35% 41% 51%
UV index 5 4 3
Daily sunshine 13h 11h 7h
Sunrise and sunset
Sunrise time 04h37 05h48 06h57
Sunset time 20h08 18h39 17h12
Day length 15h31 12h51 10h15
Our opinion on the climate in September
The review of Where And When favourable weather favourable weather adverse weather
Activities and events

What to do in Sandefjord in September?

Best activities in September
Cultural visits and heritageGastronomy
Possible activities in September
Beach and swimmingHiking and trekkingAnimal observationNature and landscapesBoat trip and cruise
Observed weather

What was the weather like in Sandefjord in September last?

Find the observed weather calendar in Sandefjord in September 2025, with each day’s weather, temperatures and precipitation.

Mon. Tue. Wed. Thu. Fri. Sat. Sun.
1
Patchy rain nearby
15°C18°C3.7 mm
2
Clear/Sunny
14°C18°C0.0 mm
3
Clear/Sunny
13°C18°C1.7 mm
4
Patchy rain nearby
15°C17°C2.3 mm
5
Patchy rain nearby
15°C17°C1.4 mm
6
Clear/Sunny
13°C18°C0.3 mm
7
Clear/Sunny
12°C18°C0.0 mm
8
Overcast
12°C19°C0.0 mm
9
Partly Cloudy
13°C19°C0.0 mm
10
Light rain shower
15°C19°C1.5 mm
11
Light rain shower
16°C18°C3.3 mm
12
Light rain shower
13°C15°C5.2 mm
13
Patchy rain nearby
12°C16°C3.5 mm
14
Light rain shower
13°C15°C9.1 mm
15
Light rain shower
12°C14°C5.3 mm
16
Patchy rain nearby
13°C16°C5.2 mm
17
Clear/Sunny
10°C16°C0.3 mm
18
Cloudy
12°C17°C0.0 mm
19
Partly Cloudy
14°C18°C0.0 mm
20
Cloudy
16°C18°C0.1 mm
21
Clear/Sunny
14°C16°C1.8 mm
22
Clear/Sunny
8°C14°C0.0 mm
23
Clear/Sunny
6°C13°C0.0 mm
24
Clear/Sunny
7°C13°C0.0 mm
25
Clear/Sunny
7°C14°C0.0 mm
26
Clear/Sunny
9°C14°C0.0 mm
27
Clear/Sunny
9°C14°C0.0 mm
28
Clear/Sunny
10°C14°C0.0 mm
29
Patchy rain nearby
12°C13°C1.3 mm
30
Patchy rain nearby
10°C12°C0.5 mm
Nearby

Where to go near Sandefjord in September?

Compare cities and destinations near Sandefjord in September to find another travel stop, a nearby alternative or a logical continuation of your stay in Sandefjord.

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Every month

Best time to visit Sandefjord month by month

Compare the weather in Sandefjord across all months of the year and open each detailed page to find the best time.

Frequently asked questions

Travel to to Sandefjord in September: your frequently asked questions

Short answers to the questions we ask ourselves before booking for this month.

Yes, it’s a good time. Conditions are favorable in Sandefjord in September, which places this month 4th out of 12.

Expect an average of 16°C during the day and 12°C at night, with about 78 mm of precipitation spread over 5 rainy days.

The sea is only 16°C on average in September. Swimming is still possible, but it will be cool.

Expect about 11.2 hours of sunshine per day on average for this month.

This month is particularly suited to these activities: Cultural visits and heritage and Gastronomy. These are the ones for which the conditions on site are most favourable.

Visitor numbers are moderate: this month is in Moderate crowds, with an index of 45/100. It is often a good compromise between weather and tranquility.

Prices are average: level Moderate prices, with an index of 46/100, including flights and accommodation.

The most favorable months in Sandefjord are: June, July, August and September. You are therefore already in one of the best times of the year; shifting your plans would not gain you much in terms of weather.
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Temperatures are shown in degrees Celsius and precipitation in millimetres. Based on your country of connection, °F and inches may be more familiar to you.