Experienced divers only
Is it worth the trip?
78Good out of 100 for your dates
Best on Mon 9: Sea: flat, Visibility about 15 m, Water 30 °C
Tue 3 · 82 out of 100
- Sea
- 0.1 mflat
- Wind
- 7 kn
- Gusts
- 11kn
- Air
- 29°C
Wed 4 · 80 out of 100
- Sea
- 0.2 mflat
- Wind
- 14 kn
- Gusts
- 19kn
- Air
- 28°C
Thu 5 · 74 out of 100
- Sea
- 0.1 mflat
- Wind
- 5 kn
- Gusts
- 7kn
- Air
- 28°C
Fri 6 · 73 out of 100
- Sea
- 0.1 mflat
- Wind
- 6 kn
- Gusts
- 11kn
- Air
- 28°C
Sat 7 · 73 out of 100
- Sea
- 0.1 mflat
- Wind
- 6 kn
- Gusts
- 11kn
- Air
- 28°C
Sun 8 · 74 out of 100
- Sea
- 0.1 mflat
- Wind
- 4 kn
- Gusts
- 7kn
- Air
- 28°C
Mon 9 · 83 out of 100
- Sea
- 0.1 mflat
- Wind
- 4 kn
- Gusts
- 9kn
- Air
- 28°C
Tap a day for sea, wind and water. Full forecast
Forecast: next 10 days
Full forecast- Mon 282, good
- Tue 382, good
- Wed 480, good
- Thu 574, good
- Fri 673, good
- Sat 773, good
- Sun 874, good
- Mon 983, good
- Tue 1080, good
- Wed 1181, good
The site in five facts
- Down to 45 mits deepest
- From a boathow you get in
- Experienced / deepexperienced divers only
- Water 30 °Crash vest or 1 to 2 mm
- Faces SWswell 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 experienced divers only, as a dive guide states it. Scored for experienced divers.
| Day | Score | Sea | Wind | Gusts | Air |
|---|---|---|---|---|---|
| Mon 2Nov | 82, good | 0.1 mflat | 8 kn | 13kn | 29°C |
| Tue 3Nov | 82, good | 0.1 mflat | 7 kn | 11kn | 29°C |
| Wed 4Nov | 80, good | 0.2 mflat | 14 kn | 19kn | 28°C |
| Thu 5Nov | 74, good | 0.1 mflat | 5 kn | 7kn | 28°C |
| Fri 6Nov | 73, good | 0.1 mflat | 6 kn | 11kn | 28°C |
| Sat 7Nov | 73, good | 0.1 mflat | 6 kn | 11kn | 28°C |
| Sun 8Nov | 74, good | 0.1 mflat | 4 kn | 7kn | 28°C |
| Mon 9Nov | 83, good | 0.1 mflat | 4 kn | 9kn | 28°C |
| Tue 10Nov | 80, good | 0.3 m | 13 kn | 17kn | 29°C |
| Wed 11Nov | 81, good | – | 12 kn | 18kn | 29°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
- Mon 2 NovLow 04:52 −0.3 mHigh 18:15 +0.3 m
- Tue 3 NovLow 06:10 −0.3 mHigh 16:47 +0.2 m
- Wed 4 NovLow 07:00 −0.3 mHigh 15:30 +0.2 mLow 22:03 +0.0 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.
Map
the site and its town
Twin Tunnels 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.
More diving near here
5 places
- Sea Lark Channel 23 km away
- USS John Penn 28.7 km away
- B-17 Flying Fortress 29.3 km away
- Custom's House Wreck 29.6 km away
- Bonegi 2 Wreck 39.4 km away
About
the place in full, sources, credits
About Twin Tunnels
A cave dive. It goes down to 45 m. You get in from a boat. It suits experienced divers only, as a dive guide states it. The coast faces SW: swell from the SW reaches it, and wind from the NE blows out to sea. No dive centre within 50 km on the map: book a liveaboard or a boat from further off. The sea is about 29°C in July, its coldest month (rash vest or 1 to 2 mm), and 30°C in January, its warmest (rash vest or 1 to 2 mm). The town to stay in is Honiara. Within 5 km we also list 1 dive site.
- What it is Cave.
- How deep Down to 45 m: technical diving, past the 40 m recreational limit.
- Getting in From a boat.
- Who it suits Suits experienced divers only, as a dive guide states it.
- Dive centres No dive centre within 50 km on the map: book a liveaboard or a boat from further off.
Water about 30°C: rash vest or 1 to 2 mm. Typical sea temperature for the time of year, not a forecast.
Visibility about 15 m. Typical for the time of year, estimated from ten years of NASA satellite water clarity, not a forecast. Clearest in Mar (about 25 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$1,310–US$2,560 each
about US$1,310–US$2,560 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 30 October 2026.
How we worked it out
| What | How we worked it out | Each |
|---|---|---|
| Flights | return MDW to HIR, estimated from distance and season, changing at LAX and BNE, full-service airlines, with a hold bag | about US$791–US$1,640 |
| Hire car | 6 days, shared | about US$100–US$174 |
| 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$1,310–US$2,560 |
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: Honiara
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 10m by car · 26 places to stay
About Honiara 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 32h 55m
About 32h 55m door to door from Chicago
Fly MDW → HIR, changing at Los Angeles International Airport (LAX) and Brisbane International Airport (BNE), then 55 min by road
Flights MDW → HIR on your dates · AviasalesAd
An estimate, one way; the journey never changes the score.
In the water
Dives and courses in Honiara · GetYourGuideDive gear hire in Honiara · GetYourGuide
Dive centres nearby
No dive centre mapped within 50 km.
Dive centres: © OpenStreetMap contributors (ODbL). Credits
What you might see
Too few open records near this site to list its animals. Ask a dive centre what you are likely to see.
This week's visibility, the current and the life no free forecast gives. Ask a dive centre before you book.