Umm al-Maradim Island tide times

Umm al-Maradim is Kuwait's southernmost island, a flat coral formation sitting at the edge of Kuwait's territorial waters in the central Persian Gulf. Like Qaruh to its northeast, the island is uninhabited and low-lying, barely 1 metre above mean sea level on its highest point. The island is enclosed within Kuwait's Umm al-Maradim Nature Reserve, established for its importance to nesting seabirds and as flamingo habitat.

The island sits on an extensive shallow bank at 2 to 8 metres depth. The bank's coral and seagrass matrix supports a fish and invertebrate community that has attracted artisanal fishermen from Kuwait and adjacent Saudi Arabia for centuries. The same shallow, warm, productive bank is why greater flamingos choose the island's intertidal flat as a seasonal foraging and staging area.

Tide predictions for Umm al-Maradim come from Open-Meteo Marine's global model. Timing accuracy ±45 minutes, height accuracy ±0.2 to 0.3 metres. The Persian Gulf at this latitude shows mixed semidiurnal tides with pronounced diurnal inequality; spring range is approximately 1.5 to 2.5 metres. Given the island's elevation of barely 1 metre, the interaction between storm surge and high spring tide is a real flood risk. Shamal wind events in the winter and early summer can push 0.5 to 1.0 metres of additional water onto the bank, and island areas that are normally dry at high tide can become briefly submerged.

For the flamingo population, this tidal flooding is a feature rather than a hazard: the surge events wash fresh invertebrate-rich water across the flat, concentrating the brine shrimp and blue-green algae that flamingos feed on. Flamingo numbers at Umm al-Maradim peak between November and April, with counts of several hundred to a few thousand birds recorded. Peak feeding activity is at low tide on calm mornings when the birds have maximum access to the exposed mud flat.

For divers and anglers, the bank around Umm al-Maradim is comparable to Qaruh: grouper, sea bream, and emperorfish over the coral and rocky patches; queenfish and trevally in the water column on the ebb current. The boat passage from mainland Kuwait to Umm al-Maradim is longer than to Qaruh — approximately 110 to 130 kilometres from Kuwait City — and the crossing time is 4 to 5 hours on a standard charter vessel.

Access follows the same restrictions as Qaruh: private charter only, permits required from the Kuwait Environment Public Authority for overnight stays, no facilities on the island. The summer months are impractical due to extreme heat. October through April is the access season that aligns with flamingo presence and manageable air temperatures.

The coral at Umm al-Maradim represents the far southern extension of the Kuwaiti offshore reef system. The Gulf coral assemblage here is depauperate by Indo-Pacific standards — perhaps 30 to 40 coral species compared to 500 or more on a healthy Indo-Pacific reef — but the specimens that persist have been demonstrated to survive conditions that would bleach most other corals. Research from Umm al-Maradim's reef has contributed to the growing body of literature on Gulf coral thermotolerance. The genetic and physiological mechanisms that allow these corals to survive 34°C summer temperatures are of direct interest to coral reef restoration science globally.

The island's extremely low elevation — under 1 metre on the highest point — makes it vulnerable to sea-level rise on a decadal scale. Even modest increases in mean sea level, combined with higher surge events from intensifying Gulf weather systems, will affect the nesting habitat and the flat intertidal zone that flamingos depend on. The Kuwait Environment Public Authority's management of the reserve includes periodic elevation surveys to track beach and island surface changes.

The surrounding water supports a population of hawksbill sea turtles that feed on the sponge and soft coral organisms on the reef patches. Green turtles use the seagrass beds in the shallower bank areas. Both species are legally protected; the reserve status of the island provides additional protection from incidental capture in the restricted-access zone.