Rimouski tide times

Rimouski sits on the south shore of the St. Lawrence estuary where the river is still 48 km wide and the tides have been building for 400 km since Gaspé. Spring range here reaches 4.2 m above chart datum; neap range drops to roughly 2.1 m. The estuary runs at its widest and the tidal prism is enormous. On a big spring ebb the current in the main navigation channel runs at 2–3 knots; inshore it is gentler but still purposeful. The exposed foreshore east of the city stretches 400–600 m at low spring water, revealing the mud-and-gravel flats that shorebirds work systematically through the autumn migration.

Bic National Park, 25 km west on the same shore, deserves its own plan. The park's sea-stack archipelago — a jumble of rocky islands, channels, and coves — is only fully navigable around high water when the submerged ledges are covered. Approach too early on the ebb and you are dragging a loaded kayak through boot-sucking grey mud. The standard park loop runs roughly 14 km and is best started 90 minutes before high water, letting the flood carry paddlers into the inner passages and giving a two-hour window to explore before the ebb begins. Grey and harbour seals haul out on the outer islands in numbers; the Île du Bic seal colony is one of the most accessible in the region. Bring binoculars; 200 m is normal viewing distance at low water. The park campground books out in July and August — reserve in March for summer weekends.

Rimouski serves anglers targeting the strong tidal currents for striped bass and Atlantic cod. The mouth of the Rivière Rimouski is a productive zone on the early flood when bass move up from the deep channel. From the municipal pier, the downstream ebb tide is the productive direction for cod jigging — the fish hold behind the bottom structure and feed into the current. Local regulations allow year-round cod retention up to the daily bag limit.

The wreck of the Empress of Ireland lies 4 km offshore in 40 m of water. She went down in May 1914 with 1,012 lives lost, the worst maritime disaster in Canadian history. The dive site is accessible on calm days from late June through August; a licensed Rimouski operator runs scheduled trips. Visibility peaks in August when the estuary stratifies and the surface layer clears. The site is diveable on slack water only — the current around the wreck at mid-ebb makes approach dangerous. Advanced open-water certification is required.

Beluga whales are a real possibility at Rimouski. The city sits within the lower end of the St. Lawrence beluga range, and sightings from shore — especially from the Pointe-au-Père lighthouse 5 km east of downtown — are reasonably regular in summer. The lighthouse station doubles as the Empress of Ireland museum and is the best elevated viewing point on this stretch of coast: from the gallery you can see the current edge in the main channel on a spring ebb, and the whale breath plumes on a still morning in July.

For families, the Jardins de la Mer park just east of downtown has a gentle beach accessible at mid-tide and above — below half-tide the rocks are slippery but the tidepooling among them is excellent. Children reliably find periwinkles, rock crabs, and sea anemones in the pools within the first 10 minutes of searching. The foreshore stays exposed for 90–120 minutes around low water, giving enough time for a proper tidepool session before the flood returns.

Tidal predictions here use the Open-Meteo Marine gridded model (±45 minutes on timing, ±0.3 m on height). Not for navigation.