Chole Bay tide times

Chole Bay is the main anchorage of Mafia Island Marine Park, a sheltered body of water between Mafia Island to the west and the smaller islands of Chole, Juani, and Jibondo to the east. The bay is protected from the open Indian Ocean swell by its island geography, which makes it the operational hub of the marine park — dive boats, fishing dhows, cargo vessels, and kayaks all share the same water. The tidal channel between Mafia and Chole Island runs 1 to 2 knots at spring tides, which is noticeable in a kayak or canoe but manageable if the direction is factored into route planning.

5 metres, consistent with the wider Mafia Island system. The most immediately visible effect of this range is on the bay's southern fringe, where mangrove and mudflat transition sharply between high and low water states. At high water the mangrove appears to stand in open water; at low water a wide belt of root system and dark mud is exposed, grazed by red-billed oxpeckers in the morning and by herons from mid-morning onwards.

The 19th-century Arab ruins on Chole Island — referred to collectively as Chole Mjini — are one of the more unusual coastal heritage sites in the western Indian Ocean. The ruins are extensive: coral-rag walls of former merchants' houses, warehouses, and a small citadel, now colonised by old baobab trees that have pushed through the masonry. The site is accessible at any state of tide — the island is reached by a 10-minute boat crossing from Utende on Mafia, and there is no tidal restriction on landing.

A small community-run canopy lodge operates within the ruins. Traditional dhow building is practised at the fishing cooperative on Jibondo Island, the southernmost of the Chole Bay island group. Jibondo has a strong fishing tradition; its fishermen operate ngalawa outriggers and larger motorised dhows through the bay channels and into offshore waters.

The cooperative continues to build traditional wooden dhows using adze and hand tools, and the process is visible to visitors who arrive during construction periods. There is no formal tour infrastructure — this is working boat construction, not a demonstration. Birdwatching in Chole Bay is productive in the mangrove fringe: mangrove kingfisher is resident, African fish eagle is frequently visible over the open water, and the mudflat at low tide draws waders (common sandpiper, whimbrel, greenshank) in the northern winter months.

The open bay also hosts Roseate tern over the water in the northeast monsoon season. For kayakers, the bay is navigable at any tide, but the current in the main channel between Mafia and Chole islands should be planned for rather than ignored. A circuit around Chole Island by kayak works best starting on the flood tide, crossing the channel with the current, circumnavigating the island, and returning across the channel as the flood slackens near high water.

The circuit is around 12 kilometres and takes 3 to 4 hours at a relaxed pace. Snorkelling directly within Chole Bay is possible but the sedimentation from tidal channels reduces visibility compared to the outer reef sites — visibility is typically 3 to 8 metres inside the bay versus 15 to 25 metres on the outer wall. The bay's seagrass beds are worth a shallow inspection for turtle, ray, and seagrass fauna even at low visibility.

Predictions on this page come from Open-Meteo Marine, a gridded global ocean model. 3 metres on height — model-derived, not from a local gauge. The national authorities are the Tanzania Meteorological Authority (TMA) and Tanzania Ports Authority; the Zanzibar gauge provides the nearest long-term tidal reference.