Portsmouth Weather in March
During March, Portsmouth experiences high daytime temperatures of 27°C (81°F) and cooler nights around 24°C (75°F). As the driest month of the year, rainfall is at its lowest.
Rainfall in Portsmouth in March
Take advantage of the dry conditions this month, with minimal rain expected. You can expect rain on roughly 15 days based on historical data, averaging 33 mm (1.3 in) for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Portsmouth in March
Weather in Portsmouth is at its excellent in March. Highs reach 27°C (81°F), while nights settle around 24°C (75°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 24°C (75°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.
Sunshine in Portsmouth in March
Expect a lot of sunshine this month, with about 227 hours of sun. These sunny conditions add to the overall experience.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Dominica, check out our Portsmouth's climate page.
Portsmouth Temperature in March
Min Temperature
24°C (75°F)
Max Temperature
27°C (81°F)
Chance of Rain
49%
Precipitation
33 mm (1.3 in)
Rainy days
15 days
Humidity
65% *
Sunshine
227 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Portsmouth typically stay consistent throughout March, with daily highs averaging around 27°C (81°F). Nights are warm, with lows around 22°C (72°F).
Average temperatures in March
Historical weather for Portsmouth in March
Browse day-by-day weather records for Portsmouth spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Portsmouth historical weather extremes in March
Based on 50 years of weather observations in Portsmouth between 1976 and 2026, these are the recorded extremes.
- The warmest day in March was on March 11, 1980, with a maximum of 34°C (93°F).
- The lowest daytime temperature in March was 25°C (77°F), recorded on March 9, 1988.
- The coldest night in March in Portsmouth was on March 29, 1989, with a minimum of 16°C (61°F).
Best Places in Dominica in March
Find out more about the weather in Dominica and which places have the best travel conditions in this month. See all of Dominica in March →
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What to Wear in Portsmouth in March
Warm weather calls for comfortable, breathable clothing in March. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Some rain is possible, so pack something to handle light showers. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Portsmouth in March
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Dominica, check out our Portsmouth's climate page.
Temperature Rainfall Sunshine Humidity
See the full Portsmouth climate overview or explore weather in Dominica.
