Pulau Yum

Conditions at Pulau Yum through the year

Sea surface temperature at the site coordinates, averaged per month from hourly model values for 2024. The water is warmest in November at about 31 °C and coolest in February at about 30 °C, a spread of 0.9 degrees across the year.

Ocean current at the site runs at a typical 1.8 km/h. In the strongest tenth of the hours modelled for 2024 it reaches 3.5 km/h, which is when entries are normally timed to slack water at the turn of the tide.

The tide moves the water level by a median 1.1 m over a day, and by up to 1.5 m on the largest days of the month. That range drives how much water is exchanged over the reef and when the current turns.

In the open sea off Pulau Yum, the highest wave of the day exceeded 1.5 m on 0.0 % of days between 2015 and 2024. In no month did this happen on more than 1 % of days. Land within 10 km blocks some of the directions these waves come from (open to about 56 % of them), so conditions at the site are likely calmer than these open-sea values.

The seabed directly under the site coordinates sits at about 33 m. This is a bathymetry grid value with a cell size of roughly 450 m, so it describes the depth of the area rather than the deepest point a dive can reach.

Satellite habitat mapping places Pulau Yum on a deep lagoon, over a seabed mapped as coral and algae. The classification comes from the nearest mapped reef polygon, about 50 m from the listed coordinates, so it describes the reef the site sits on rather than a single point on it.

How Pulau Yum compares

These comparisons use only the measured values above, set against the 351 dive sites published on findadive.com. A percentage shows the share of other sites with a lower (or higher) value, so it reads the same way wherever the site is. Pulau Yum sits with its mean water temperature in the top tenth and its coolest-month water temperature in the top tenth of all listed sites.

Water temperature, current and tide from Open-Meteo Marine (CC BY 4.0), hourly model values for 2024 at -0.7858°, 130.7578°. Seabed depth from the GEBCO 2020 Grid. Wave statistics from ERA5-Ocean via Open-Meteo Marine (contains modified Copernicus Climate Change Service information 2015–2024), daily maximum wave height on a 0.5° grid; land shelter tested against Natural Earth coastlines. Reef structure and seabed cover from the Allen Coral Atlas © 2018–2023 Allen Coral Atlas Partnership and Arizona State University (CC BY 4.0).