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Black Forrest

📍 Komodo, Indonesia

Elysia marginata (Elysia marginata) — recorded at Black Forrest

Black Forrest is a dive site in Komodo, Indonesia. Currents typically run at 1.1 km/h and reach 2.6 km/h on the strongest days. Water temperatures range from 28°C in August to 31°C in November. The typical daily tidal range is about 1.4 m. Species recorded in the area include Chamberlain's Nembrotha, Elysia marginata, Streaked Chromodoris, Willey’s Nudibranch and Tiled Sea Star.

Dive Conditions

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Current
1.1 km/h (2.6)
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Water Temp
28–31 °C

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Typical Current 1.1 km/h (up to 2.6)
Water Temperature 28–31 °C
Tidal Range 1.4 m (typical daily)
GPS -8.1383°, 119.0975°

Data sources: currents and water temperature from Open-Meteo Marine (CC BY 4.0), hourly model values 2024. Tidal range is the median daily range of modelled sea level from Open-Meteo Marine, hourly values 2024. Species observations from iNaturalist, checked against the World Register of Marine Species.

Conditions at Black Forrest 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 August at about 28 °C, a spread of 2.6 degrees across the year.

Monthly sea surface temperature at Black Forrest (°C)
JanFebMarAprMayJunJulAugSepOctNovDec
29.0 28.9 29.2 29.7 29.5 28.9 28.4 27.9 28.1 29.3 30.5 30.1

Ocean current at the site runs at a typical 1.1 km/h. In the strongest tenth of the hours modelled for 2024 it reaches 2.6 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 1.4 m over a day, and by up to 1.8 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 Black Forrest, the highest wave of the day exceeded 1.5 m on 2.7 % of days between 2015 and 2024. The roughest month was January (15 % of days), the calmest May (0 %).

Share of days with waves above 1.5 m, open sea near Black Forrest (%, 2015–2024)
JanFebMarAprMayJunJulAugSepOctNovDec
1583001000005

How Black Forrest compares

These comparisons use only the measured values above, set against the 376 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.

Black Forrest compared with all listed sites and with Komodo
MeasureThis siteCompared with all sitesMedian in Komodo
Mean water temperature29.1 °Ccooler than 66 % of the other 375 sites28.8 °C (68 sites)
Water temperature in the coolest month27.9 °Ccooler than 74 % of the other 375 sites27.9 °C (68 sites)
Typical current1.1 km/hstronger than 50 % of the other 375 sites1.2 km/h (68 sites)
Current in the strongest 10 % of hours2.6 km/hstronger than 52 % of the other 375 sites2.7 km/h (68 sites)
Median daily tidal range1.4 msmaller than 56 % of the other 375 sites1.5 m (68 sites)

Water temperature, current and tide from Open-Meteo Marine (CC BY 4.0), hourly model values for 2024 at -8.1383°, 119.0975°. 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.

Marine life recorded at this site

Research-grade observations from iNaturalist within about 12 km of these coordinates.

Chamberlain's Nembrotha (Nembrotha chamberlaini)
Chamberlain's Nembrotha Nembrotha chamberlaini A large nudibranch with a black body and bright green markings along its back and sides, often seen crawling on the reef.to 12 cm · 5-30 m · day and nightcoral and rocky reefs, often on spongesLook for its distinctive colour on reef slopes and walls, especially near its sponge prey. (c) Bernard Picton, some rights reserved (CC BY) · observation
Elysia marginata (Elysia marginata)
Elysia marginata Elysia marginata A small sea slug with a leaf-like body, often green with a white margin and a red or orange line along the edge. It resembles a piece of lettuce.to 4 cm · 0-10 m · by dayshallow algae-covered rocks or seagrassLook for its distinctive shape and colour on flat algae-covered surfaces, often in calm, sunny spots. (c) Bernard Picton, some rights reserved (CC BY) · observation
Streaked Chromodoris (Chromodoris strigata)
Streaked Chromodoris Chromodoris strigata A nudibranch with a white body and a pattern of black lines and orange spots on its mantle. The gills and rhinophores are orange.to 5 cm · 5-30 m · day and nightreef slopes and walls, often on spongesLook for it crawling slowly on sponges, its primary food source; its bright pattern is a warning of toxicity. (c) Bernard Picton, some rights reserved (CC BY) · observation
Willey’s Nudibranch (Halgerda willeyi)
Willey’s Nudibranch Halgerda willeyi A nudibranch with a translucent white body covered in a network of raised orange lines and yellow spots, giving it a distinctive patterned appearance.to 6 cm · 5-30 m · day and nightreef slopes and walls, often on spongesLook for its bright pattern on shaded vertical surfaces and overhangs, where it feeds on sponges. (c) Bernard Picton, some rights reserved (CC BY) · observation
Tiled Sea Star (Fromia monilis)
Tiled Sea Star Fromia monilis A small sea star with a rigid, tiled appearance, often bright red or orange with contrasting white or cream tubercles.to 10 cm diameter · 5-30 m · day and nightcoral rubble and hard substrates on reefsLook for its distinctive pattern on the sides of coral bommies or under ledges, often partially hidden. (c) Bernard Picton, some rights reserved (CC BY) · observation