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Simons Reef

West Nusa Tenggara, IndonesiaDirections
Rash guard or 2mm shorty typical

Simons Reef at a glance

Simons Reef is a dive site in West Nusa Tenggara, Indonesia. Typically most favorable Apr–May · from 3 years of archive data. Divers commonly see Giant Moray, Clown Anemonefish, and Orange-lined Triggerfish. Recent reports put the water around 30°C (86°F). Check the latest conditions and entry details before you go.

Favorable window now· until 19:00 · sunset 18:10

Forecast for this hour · 15:00 · run 1 h ago
0.9 m (3.0 ft)waves — under a meter expected (waves — about three feet expected)

Tap a factor for its source and model point · Forecast 30°C · seasonal avg 29°C ( · Forecast 86°F · seasonal avg 85°F)

Dive windows this week

Smallest waves: Fri
Mon14:00–19:00 favorable

0.9 m waves · 3 kn wind (3.0 ft waves · 3 kn wind)

Tue6:00–19:00 favorable

0.7 m waves · 4 kn wind (2.4 ft waves · 4 kn wind)

Wed6:00–19:00 favorable

0.6 m waves · 4 kn wind (1.9 ft waves · 4 kn wind)

Thu6:00–19:00 favorable

0.5 m waves · 3 kn wind (1.6 ft waves · 3 kn wind)

Fri6:00–19:00 favorable

0.4 m waves · 2 kn wind (1.3 ft waves · 2 kn wind)

Sat6:00–19:00 favorable

0.5 m waves · 3 kn wind (1.6 ft waves · 3 kn wind)

Sun6:00–19:00 favorable

0.5 m waves · 1 kn wind (1.6 ft waves · 1 kn wind)

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 5:27 · Sunrise 5:48 · Sunset 18:10 · some windows run past sunset

Source: Open-Meteo marine · model point 5.5 km from site · updated 26 Oct, 13:24 GMT+8

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Simons Reef

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. January, 95% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 1.0 m (3.3 ft), wind has typically been 8 knots
  2. February, 93% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 1.0 m (3.4 ft), wind has typically been 9 knots
  3. March, 98% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.0 m (3.1 ft), wind has typically been 8 knots
  4. April, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.9 m (2.9 ft), wind has typically been 7 knots, historically most favorable
  5. May, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.9 m (2.8 ft), wind has typically been 9 knots, historically most favorable
  6. June, 96% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 1.1 m (3.4 ft), wind has typically been 9 knots
  7. July, 97% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 1.1 m (3.6 ft), wind has typically been 11 knots
  8. August, 95% of days have historically been favorable, water has typically been 28°C (83°F), waves have typically been 1.1 m (3.6 ft), wind has typically been 10 knots
  9. September, 99% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 1.1 m (3.4 ft), wind has typically been 10 knots
  10. October, 97% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 1.0 m (3.3 ft), wind has typically been 10 knots
  11. November, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.9 m (2.8 ft), wind has typically been 8 knots, historically most favorable
  12. December, 100% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.0 m (3.2 ft), wind has typically been 9 knots, historically most favorable

April, May, November, and December have typically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life recorded at this site, by month

Recorded observations — evidence of past sightings, not a promise of what you’ll encounter.

  • Clown Anemonefish recorded here Oct (1 record)

    Amphiprion ocellarismost recent 2016

  • Giant Moray recorded here Feb (1 record)

    Gymnothorax javanicusmost recent 2016

  • Green Turtle recorded here Oct (1 record)

    Chelonia mydasmost recent 2016

  • Hawksbill turtle recorded here Oct (1 record)

    Eretmochelys imbricatamost recent 2015

  • Orange-lined Triggerfish recorded here Feb (1 record)

    Balistapus undulatusmost recent 2016

Newest record here: 2016. Counts are occurrence records near this site from public biodiversity datasets (GBIF), grouped by calendar month across all sampled years. Sightings vary — past records are context, not a prediction.

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Data updated July 2026

Site details

A dive site in Indonesia.

No hazards recorded for this site yet — that never means there are none. Ask a local operator before you dive.

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