Weather forecast in Portland Harbour

This data display current weather and forecast for the coming days in Portland Harbour. In addition to temperature, wind, humidity and pressure, we include data on the probability of precipitation so you can have all the information about your destination before your trip.

Portland Harbour current temperature and weather

6 September 2025

Night
15.9°C Feels like: 15.9°C	Clear
	Wind: 16.6 Km/h (10.3 mph) SE Pressure: 1020 hPa (30.11 inHg) Humidity: 79%	Precip. prob.: 0% Visibility: 10 km (6 mi) UV index: 0
Morning
17.9°C Feels like: 17.9°C	Sunny
	Wind: 28.8 Km/h (17.9 mph) SE Pressure: 1017 hPa (30.03 inHg) Humidity: 77%	Precip. prob.: 0% Visibility: 10 km (6 mi) UV index: 0.8
Day
19.5°C Feels like: 19.5°C	Overcast
	Wind: 37.1 Km/h (23 mph) E Pressure: 1012 hPa (29.88 inHg) Humidity: 65%	Precip. prob.: 0% Visibility: 10 km (6 mi) UV index: 3.5
Evening
20.6°C Feels like: 20.6°C	Clear
	Wind: 40.3 Km/h (25.1 mph) SE Pressure: 1008 hPa (29.75 inHg) Humidity: 63%	Precip. prob.: 0% Visibility: 10 km (6 mi) UV index: 0

Marine weather forecast Portland Harbour

The graphs show wave heights and directions, as well as wind speed and direction in Portland Harbour for the coming days. Click on the sea state chart for more details

In order for you to be able to estimate what the weather is like in Portland Harbour throughout the year, we provide monthly data for the last few years. Select the month you are interested in.

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Our report for Portland Harbour is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.