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Gun Beach
Dive site · Guam
Is it worth the trip?
82Good out of 100 for your dates
Best on Sat 7: Sea 0.6 m, Visibility over 30 m, Water 30 °C
Mon 2 · 67 out of 100
- Sea
- 0.9 m
- Wind
- 7 kn
- Gusts
- 16kn
- Air
- 32°C
Tue 3 · 62 out of 100
- Sea
- 0.7 m
- Wind
- 11 kn
- Gusts
- 21kn
- Air
- 32°C
Wed 4 · 63 out of 100
- Sea
- 0.7 m
- Wind
- 8 kn
- Gusts
- 18kn
- Air
- 32°C
Thu 5 · 83 out of 100
- Sea
- 0.7 m
- Wind
- 11 kn
- Gusts
- 24kn
- Air
- 32°C
Fri 6 · 86 out of 100
- Sea
- 0.6 m
- Wind
- 9 kn
- Gusts
- 21kn
- Air
- 31°C
Sat 7 · 89 out of 100
- Sea
- 0.6 m
- Wind
- 4 kn
- Gusts
- 13kn
- Air
- 33°C
Sun 8 · 88 out of 100
- Sea
- 0.4 m
- Wind
- 10 kn
- Gusts
- 22kn
- Air
- 32°C
Tap a day for sea, wind and water. Full forecast
Forecast: next 10 days
Full forecast- Sun 176, good
- Mon 267, good
- Tue 362, good
- Wed 463, good
- Thu 583, good
- Fri 686, good
- Sat 789, good
- Sun 888, good
- Mon 987, good
- Tue 1088, good
The site in six facts
- Down to 37 mits deepest
- From the shorehow you get in
- Open Waterand up
- Water 30 °Crash vest or 1 to 2 mm
- Faces NWswell from there reaches it
- Best Jun–Jul7 good days in 7
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 |
|---|---|---|---|---|---|
| Sun 1Nov | 76, good | 0.7 m | 4 kn | 10kn | 31°C |
| Mon 2Nov | 67, good | 0.9 m | 7 kn | 16kn | 32°C |
| Tue 3Nov | 62, good | 0.7 m | 11 kn | 21kn | 32°C |
| Wed 4Nov | 63, good | 0.7 m | 8 kn | 18kn | 32°C |
| Thu 5Nov | 83, good | 0.7 m | 11 kn | 24kn | 32°C |
| Fri 6Nov | 86, good | 0.6 m | 9 kn | 21kn | 31°C |
| Sat 7Nov | 89, good | 0.6 m | 4 kn | 13kn | 33°C |
| Sun 8Nov | 88, good | 0.4 m | 10 kn | 22kn | 32°C |
| Mon 9Nov | 87, good | 0.5 m | 12 kn | 23kn | 32°C |
| Tue 10Nov | 88, good | 0.5 m | 8 kn | 18kn | 31°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
- Sun 1 NovLow 06:03 −0.5 mHigh 13:54 +0.3 mLow 19:24 +0.1 mHigh 23:25 +0.2 m
- Mon 2 NovLow 07:06 −0.5 mHigh 14:48 +0.3 mLow 20:40 +0.0 m
- Tue 3 NovHigh 00:57 +0.2 mLow 08:11 −0.4 mHigh 15:33 +0.3 mLow 21:42 −0.1 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
best Jun–Jul
Good diving days in a typical week, each month, for Advanced divers, from 2016 on (ERA5 history scored the same way).
- Jan3of 7: a trip from Sat 2 Jan
- Feb2of 7: a trip from Sat 6 Feb
- Mar5of 7: a trip from Sat 6 Mar
- Apr5of 7: a trip from Sat 3 Apr
- May6of 7: a trip from Sat 1 May
- Jun7of 7: a trip from Sat 5 Jun
- Jul7of 7: a trip from Sat 3 Jul
- Aug6of 7: a trip from Sat 7 Aug
- Sep6of 7: a trip from Sat 4 Sept
- Oct6of 7: a trip from Sat 2 Oct
- Nov5of 7: a trip from Mon 2 Nov
- Dec2of 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, its town, photos
Gun Beach 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.
Photos of Gun Beach
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More diving near here
5 places
- Outhouse Beach 14.8 km away
- SMS Cormoran 15.4 km away
- Tokai Maru 15.4 km away
- Dogleg Reef 15.9 km away
- Gab Gab Reef 16.9 km away
About
the place in full, sources, credits
About Gun Beach
A reef dive. It goes down to 37 m. You get in from the shore. 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. 1 dive centre or shop within 10 km, the nearest 9.7 km away. The sea is about 28°C in January, its coldest month (3 mm wetsuit), and 30°C in June, its warmest (rash vest or 1 to 2 mm). For Advanced divers the best months are usually June and July, with about 7 good days in 7; in February and December, about 2. From the weather of past years. The town to stay in is Agat. Within 5 km we also list 1 surf spot.
- What it is Reef.
- How deep Down to 37 m.
- Getting in From the shore.
- Who it suits Suits Open Water divers and up, as a dive guide states it.
- Dive centres 1 dive centre or shop within 10 km, the nearest 9.7 km away.
Water about 30°C: rash vest or 1 to 2 mm. Typical sea temperature for the time of year, not a forecast.
Visibility over 30 m. Typical for the time of year, estimated from ten years of NASA satellite water clarity, not a forecast. Clearest in Jan, Feb, Apr, May, Jun and Nov (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$1,190–US$2,340 each
about US$1,190–US$2,340 each · 6 nights, 2 sharing: flights, taxi, 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 30 October 2026.
How we worked it out
| What | How we worked it out | Each |
|---|---|---|
| Flights | return ORD to GUM, estimated from distance and season, changing at HNL, full-service airlines, with a hold bag | about US$750–US$1,560 |
| Taxi | airport and back, shared | about US$20–US$33 |
| Stay | 6 nights, a mid-range double, shared | about US$201–US$328 |
| Food | 7 days eating out | about US$221–US$415 |
| Total | about US$1,190–US$2,340 |
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: Agat
35 min by car · 3 places to stay
About Agat its beds, food and every spot near it
Drives are estimates. Prices are about, in US Dollar (USD): our pound figures at the European Central Bank's rate of 30 October 2026.
Getting there: about 24h 40m
About 24h 40m door to door from Chicago
Fly ORD → GUM, changing at Daniel K. Inouye International Airport (HNL), then 25 min by road
Flights ORD → GUM on your dates · Skyscanner
An estimate, one way; the journey never changes the score.
In the water
Dives and courses in Agat · GetYourGuideDive gear hire in Agat · GetYourGuide
Dive centres nearby
MDA (Piti Shop) 9.7 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
Animals divers and surveys have recorded within 2 km of this site in the last 15 years. A record says someone saw it here, not that you will.
Pomacentrus vaiuli
Seen in 15 records, mostly Mar to May.
Lavender Tang Acanthurus nigrofuscus
Seen in 11 records, mostly Mar to May.
Chrysiptera traceyi
Seen in 9 records.
Mimic Surgeonfish Acanthurus pyroferus
Seen in 8 records.
Lined Bristletooth Ctenochaetus striatus
Seen in 8 records.
Rainbowfish Halichoeres hortulanus
Seen in 7 records.
Clown Tang Naso lituratus
Seen in 7 records.
Clown Tang Acanthurus lineatus
Seen in 6 records.
Stegastes lacrymatus
Seen in 6 records.
Undulated Triggerfish Balistapus undulatus
Seen in 5 records.
Blackfin Cod Cephalopholis urodeta
Seen in 5 records.
Bullethead Parrotfish Chlorurus spilurus
Seen in 5 records.
Records: OBIS (Ocean Biodiversity Information System, IOC-UNESCO), from the datasets named here, CC0 and CC BY records only. Names: WoRMS, through OBIS; common names from Wikidata. Largest datasets here: NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division, National Coral Reef Monitoring Program: Stratified random surveys (StRS) of reef fish in the U.S. Pacific Islands; MIRC PIFSC CNMI Vessel Surveys May-Jul 2012. Credits
This week: visibility over 30 m, about usual for the month (satellite plankton reading, 24 Oct). Estimated from the month's typical visibility and this week's satellite chlorophyll against the site's normal; heavy rain before a dive can still muddy it.
The current no free forecast gives. Ask a dive centre before you book.