Dominica in May: Weather, Crowds & What to Expect
Climate Map for May
Average temperature across Dominica in May.
City Weather in May
| City | High | Low | Rain | UV | Feels |
|---|---|---|---|---|---|
| Roseau | 32° | 24° | 111 mm | extreme | Hot |
| Portsmouth, Dominica | 31° | 24° | 147 mm | extreme | Hot |
| Marigot, Dominica | 30° | 24° | 165 mm | extreme | Hot |
| Grand Bay, Dominica | 30° | 23° | 112 mm | extreme | Warm |
| Mahaut, Dominica | 31° | 24° | 120 mm | extreme | Hot |
| Saint Joseph, Dominica | 31° | 24° | 126 mm | extreme | Hot |
| Wesley, Dominica | 31° | 24° | 167 mm | extreme | Hot |
High / low are average daily temperatures (°C). “Feels” reflects how hot or cold it feels, allowing for humidity.
Roseau & Southwest Coast (Roseau, Mero, Scotts Head, Champagne Reef)
May brings more humidity and the odd lengthy shower as the wet season approaches; the leeward coast still sees more sunshine than the east, but cloudbursts start to increase. Waterfalls upriver that feed the west beaches swell, which can create stronger currents around river mouths - heed local beach flags. If you plan snorkel or dive trips, monitor weather updates: operators sometimes rearrange schedules ahead of squalls.
North Coast & Cabrits Peninsula (Portsmouth, Cabrits National Park, Calibishie)
May brings a rise in humidity and more quick, soaking showers in the afternoons; inland waterways that feed northern beaches can colour nearshore water after heavy rains. Calibishie’s coastal trails remain worth the visit between showers, though rockier beaches become slicker - sturdy footwear is recommended. Travelers should book boat operators who check conditions, since short-notice cancellations become more common.
East / Atlantic Coast (Castle Bruce, La Plaine, Marigot, Grand Fond)
May increases humidity and rain frequency along the windward coast; persistent morning cloud and midday downpours are common as the wet season approaches. Water levels in rivers and small creeks rise quickly after rain, making crossing some rural tracks risky and slippery. Expect dramatically full waterfalls and powerful surf-great for dramatic landscapes but poor for casual coastal swimming or unsheltered boat trips.
Central Highlands & Morne Trois Pitons National Park (Boiling Lake, Emerald Pool, Trafalgar Falls, Waitukubuli Trail high sections)
May’s humidity and more regular downpours make the mountaintop trails noticeably muddier and slower; the Boiling Lake track can be wet and challenging, though the falls are impressively full. Expect trail detours and pack good waterproof gear, gaiters and a reliable headlamp in case you are still on the trail after a sudden rain. On bright days the mist burns off to reveal dramatic canyon views and vibrant moss-covered forest.
Southern Peninsula & Soufrière Area (Soufrière, Scotts Head peninsula, Grand Bay)
May’s humidity builds and short heavy showers become more common; the peninsula’s rivers swell, making some minor dirt tracks slippery and less reliable for self-drive exploration. The marine life continues to be active though runoff after storms can reduce visibility for dives and snorkels temporarily. Choose dive operators who monitor weather closely and have flexible cancellation policies.
Events & Festivals in May
There are no major festivals or events in Dominica during May to be aware of.