Map from Google - Dominica

Dominica, an island of the Lesser Antilles belonging to the Commonwealth, has a hot and humid climate, with limited temperature variations during the year, and maximum temperatures around 86 degrees Fahrenheit. The warmest and more sultry period is the one that runs from May to October, although the heat is tempered by the breezes.
Here are the average temperatures of Roseau.
Average temperatures - Roseau
Min (°F)727272737577777575737372
Max (°F)828282848686868886848684

The rains are abundant: in the capital Roseau, on the west coast, 78 inches of rain per year fall, of which more than 4 inches per month from May to January, and among these, more than 8 in from July to November, which is the wettest period. The least rainy period goes from February and April, with about 2.4/3.0 inches per month on average. The east coast, exposed to the northeast trade winds, is more rainy than the western one, so that it reaches 80 in of rain. In inland areas, on the slopes of the volcano Morne Diablotins, 4,747 feet high, the rains are even more frequent and abundant, so that the climate becomes equatorial, and there's a rainforest.
Here is the average precipitation.
Average precipitation - Roseau
Prec. (in)4.9332.43.77.910.810.

The rains in Dominica occur throughout the year as showers and downpours, therefore they do not reduce the sunshine hours by much, except when the island is reached by hurricanes. These may occur from June to November, but are most likely from August to October, as it happens in all the Antilles. On this island, an hurricane which has been particularly destructive was David in 1979.


For swimming, the sea is warm all year round: the water temperature varies between 79°F in February and March, and 84 °F in September and October.
Sea temperature - Dominica
Sea (°F)817979818282828284848281

When to go

The best time to visit Dominica goes from February to April, which is the least rainy. December and January are still quite rainy, even though they are less rainy than the period from July to November, which has the greatest risk of heavy showers and thunderstorms. Recall that the west coast, where Roseau is located, is more sheltered.

What to pack

All year round: light, tropics-friendly clothes of natural fabric, possibly a light sweatshirt and a light raincoat for thunderstorms. For the reef, equipment for snorkeling, water shoes or rubber soled shoes. Hiking shoes and lightweight sweatshirt for climbing Morne Diablotins.