Is it worth the trip?
81Good out of 100 for your dates
Best on Thu 5: Sea 0.5 m, Visibility about 30 m, Water 26 °C
Tue 3 · 80 out of 100
- Sea
- 0.8 m
- Wind
- 15 kn
- Gusts
- 23kn
- Air
- 25°C
Wed 4 · 86 out of 100
- Sea
- 0.6 m
- Wind
- 11 kn
- Gusts
- 15kn
- Air
- 27°C
Thu 5 · 88 out of 100
- Sea
- 0.5 m
- Wind
- 2 kn
- Gusts
- 4kn
- Air
- 26°C
Fri 6 · 84 out of 100
- Sea
- 0.6 m
- Wind
- 13 kn
- Gusts
- 20kn
- Air
- 26°C
Sat 7 · 27 out of 100
- Sea
- 1.1 m
- Wind
- 25 kn
- Gusts
- 34knboats in
- Air
- 25°C
Sun 8 · 85 out of 100
- Sea
- 0.7 m
- Wind
- 12 kn
- Gusts
- 18kn
- Air
- 26°C
Mon 9 · 82 out of 100
- Sea
- 0.7 m
- Wind
- 14 kn
- Gusts
- 22kn
- Air
- 25°C
Tap a day for sea, wind and water. Full forecast
Forecast: next 10 days
Full forecast- Tue 380, good
- Wed 486, good
- Thu 588, good
- Fri 684, good
- Sat 727, poor
- Sun 885, good
- Mon 982, good
- Tue 1068, good
- Wed 1174, good
- Thu 1286, good
The site in five facts
- Down to 20 mits deepest
- From a boathow you get in
- Open Waterand up
- Water 26 °C3 mm wetsuit
- Faces NWswell from there reaches it
Full forecast
every day, every number
The score doesn't know currents, the visibility on the day or your certification.
Suits Open Water divers and up, as a dive guide states it. Scored for Advanced divers.
| Day | Score | Sea | Wind | Gusts | Air |
|---|---|---|---|---|---|
| Tue 3Nov | 80, good | 0.8 m | 15 kn | 23kn | 25°C |
| Wed 4Nov | 86, good | 0.6 m | 11 kn | 15kn | 27°C |
| Thu 5Nov | 88, good | 0.5 m | 2 kn | 4kn | 26°C |
| Fri 6Nov | 84, good | 0.6 m | 13 kn | 20kn | 26°C |
| Sat 7Nov | 27, poor | 1.1 m | 25 kn | 34knboats in | 25°C |
| Sun 8Nov | 85, good | 0.7 m | 12 kn | 18kn | 26°C |
| Mon 9Nov | 82, good | 0.7 m | 14 kn | 22kn | 25°C |
| Tue 10Nov | 68, good | 0.9 m | 22 kn | 28knboats in | 22°C |
| Wed 11Nov | 74, good | 0.9 m | 20 kn | 27knboats in | 23°C |
| Thu 12Nov | 86, good | – | 14 kn | 22kn | 24°C |
Sea is the waves near the site, in metres; wind and gusts in knots. "Boats in": gusts that keep dive boats in. More
Tide
- Tue 3 NovHigh 00:03 +0.4 mLow 07:03 −0.6 mHigh 14:02 +0.5 mLow 20:04 −0.2 m
- Wed 4 NovHigh 01:49 +0.5 mLow 08:20 −0.6 mHigh 14:54 +0.6 mLow 21:07 −0.4 m
- Thu 5 NovHigh 03:07 +0.6 mLow 09:19 −0.6 mHigh 15:35 +0.7 mLow 21:54 −0.6 m
Local clock times; heights about mean sea level. On open coasts the times are usually within a quarter of an hour; in bays, estuaries and on the Gulf of Mexico they can be an hour or more out. Slack water, the safest time to dive where there is current, is about half an hour either side of each high and low. Tide: EOT20 global ocean tide model, Hart-Davis et al. 2021, DGFI-TUM (doi:10.17882/79489), CC BY 4.0. Times and heights computed by us. A model, not a tide table: check a local table before you go.
Forecast updated . It refreshes every three hours. Forecast data: ECMWF, DWD, Météo-France and NOAA, served by Open-Meteo.com (CC BY 4.0). Changed by us. Generated using E.U. Copernicus Marine Service Information.
Best time to go
No month stands out
Good diving days in a typical week, each month, for Advanced divers, from 2016 on (ERA5 history scored the same way).
- Jan7of 7: a trip from Sat 2 Jan
- Feb7of 7: a trip from Sat 6 Feb
- Mar7of 7: a trip from Sat 6 Mar
- Apr7of 7: a trip from Sat 3 Apr
- May7of 7: a trip from Sat 1 May
- Jun7of 7: a trip from Sat 5 Jun
- Jul6of 7: a trip from Sat 3 Jul
- Aug7of 7: a trip from Sat 7 Aug
- Sep6of 7: a trip from Sat 4 Sept
- Oct6of 7: a trip from Sat 2 Oct
- Nov7of 7: a trip from Wed 4 Nov
- Dec6of 7: a trip from Sat 5 Dec
Tap a month to see this spot for a trip then.
Typical, not a forecast: the sea and the mean wind of each day, with no gusts or rain in the history.
Map
the site and its town
阿真牛瀬・あまうしじ on Google Maps · Directions
Each place wears its best day on these dates: green good, amber fair, pale red poor, as the key says.
The map needs JavaScript. Every place on it is listed on this page, and each place's page links to Google Maps.
One finger scrolls the page; two fingers move the map. Pins are our own positions. Map OpenFreeMap, © OpenMapTiles, data © OpenStreetMap contributors.
About
the place in full, sources, credits
About 阿真牛瀬・あまうしじ
A reef dive. It goes down to 20 m. You get in from a boat. It suits Open Water divers and up, as a dive guide states it. The coast faces NW: swell from the NW reaches it, and wind from the SE blows out to sea. 10 dive centres or shops within 10 km, the nearest 2.4 km away. The sea is about 22°C in February, its coldest month (5 mm wetsuit), and 29°C in July, its warmest (rash vest or 1 to 2 mm). The town to stay in is Itoman. Within 5 km we also list 15 dive sites.
- What it is Reef.
- How deep Down to 20 m.
- Getting in From a boat.
- Who it suits Suits Open Water divers and up, as a dive guide states it.
- Dive centres 10 dive centres or shops within 10 km, the nearest 2.4 km away.
Water about 26°C: 3 mm wetsuit. Typical sea temperature for the time of year, not a forecast.
Visibility about 30 m. Typical for the time of year, estimated from ten years of NASA satellite water clarity, not a forecast. Clearest in Jul, Sep and Oct (over 30 m).
The score is the conditions only: the journey, the price and the partners never change it (how we score, how we earn).
Rough cost (estimate): about US$1,290–US$2,500 each
about US$1,290–US$2,500 each · 6 nights, 2 sharing: flights, hire car, stay, food.
Our estimate from typical public prices, not a quote: check the real prices before you book (where they come from). Prices are about, in US Dollar (USD): our pound figures at the European Central Bank's rate of 2 November 2026.
How we worked it out
| What | How we worked it out | Each |
|---|---|---|
| Flights | return ORD to OKA, estimated from distance and season, changing at HKG, full-service airlines, with a hold bag | about US$738–US$1,540 |
| Hire car | 6 days, shared | about US$107–US$174 |
| Stay | 6 nights, a mid-range double, shared | about US$208–US$349 |
| Food | 7 days eating out | about US$235–US$443 |
| Total | about US$1,290–US$2,500 |
Guided dives are not priced yet: we have no sourced price, so it is not in it. Prices from public sources, checked in 2026.
Where to stay: Itoman
Ad Links marked Ad may pay us if you book. You pay the same, and they never change a score. How we earn
about 1h 15m by car · 14 places to stay
about US$81/nightcountry average
About Itoman its beds, food and every spot near it
About US$81 a night is our estimate of the country's average 2-star double room that month: not each town's price, and not a quote. Drives are estimates. Prices are about, in US Dollar (USD): our pound figures at the European Central Bank's rate of 2 November 2026.
Getting there: about 26h 35m
About 26h 35m door to door from Chicago
Fly ORD → OKA, changing at Hong Kong International Airport (HKG), then 55 min by road
Flights ORD → OKA on your dates · AviasalesAdeSIM for your phone · Search on AiraloAd
An estimate, one way; the journey never changes the score.
In the water
Dives and courses in Itoman · GetYourGuideDive gear hire in Itoman · GetYourGuide
Dive centres nearby
ダイブイン浜 2.4 km
インザストリーム 2.4 km
レンタルショップ比嘉 2.4 km
えりせら ダイビング 2.4 km
Coral Divers 2.5 km
The nearest named dive centres and shops within 25 km, in a straight line; training agencies where the map states them. Listings, not a recommendation. Dive centres: © OpenStreetMap contributors (ODbL). Credits
What you might see
Too few records at this site itself, so these are the animals divers and surveys have recorded at other sites within 25 km in the last 15 years. A record says someone saw it there, not that you will.
Clark's anemonefish Amphiprion clarkii
Seen in 10 records, mostly Aug to Sep.
Dascyllus reticulatusDamselfishes
Seen in 9 records.
Moorish idol Zanclus cornutus
Seen in 9 records.
Gendarme Fish Acanthurus olivaceus
Seen in 7 records.
Valentin's sharpnose puffer Canthigaster valentini
Seen in 7 records.
Bird wrasse Gomphosus varius
Seen in 7 records.
Paracanthurus Paracanthurus hepatus
Seen in 7 records.
Blue-green damselfish Chromis viridis
Seen in 6 records.
Swift-footed crab Grapsus albolineatus
Seen in 6 records.
Holothuria atra
Seen in 6 records.
Scissortail sergeant Abudefduf sexfasciatus
Seen in 5 records.
Greenfish Stichopus chloronotus
Seen in 5 records.
Records: OBIS (Ocean Biodiversity Information System, IOC-UNESCO) and GBIF.org (1 November 2026, doi:10.15468/dl.jeesns), from the datasets named here, CC0 and CC BY records only. Names: WoRMS and GBIF; common names from the Catalogue of Life, the GBIF Backbone and Wikidata. Largest datasets here: iNaturalist Research-grade Observations; Programme CROMIS: carnet de plongée en ligne de la FFESSM-Observations d'espèces subaquatiques collectées par les utilisateurs de CROMIS; Sea cucumber occurrence records from surveys of coral reef environments across 17 islands in the Ryukyu Archipelago, Japan (2022–2026); Fish collection of the Kagoshima University Museum; INSDC Sequences. Credits
This week's visibility and the current no free forecast gives. Ask a dive centre before you book.
Saved: this link opens the same trip
The link holds the trip itself: nothing about you is kept. Check the forecast again before you book.