Big Mouth Cave scuba diving weather

Boat dive · Honolulu, Hawaii · Show on map

Now · 05:00Excellent

87out of 100

Excellent conditions. Best 07:00–10:00. From 10:00 gusts pick up and it turns good.

Waves: 1.0 m
Wind: 2 kn from ENE; gusts 9 · offshore
Water: 26 °C; same down to ~56 m
Suit: 3 mm; whole dive

Hour by hour today

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Score	Waves	Wind (gusts)	Current	Swell	Water	Air	Rain	Limited by
87	1.1 m	2 (9 kn) ↓	0.4 kn	0.3 m · 9 s ↓	26.4 °C	22 °C	–	waves
88	1.0 m	3 (9 kn) ↓	0.4 kn	0.3 m · 9 s ↓	26.4 °C	22 °C	–	waves
91	1.0 m	3 (10 kn) ↓	0.3 kn	0.3 m · 10 s ↓	26.4 °C	22 °C	–	waves
92	1.0 m	5 (15 kn) ↓	0.2 kn	0.3 m · 10 s ↓	26.4 °C	24 °C	–	waves
91	1.0 m	8 (20 kn) ↓	0.1 kn	0.3 m · 10 s ↓	26.4 °C	26 °C	–	waves
75	1.0 m	11 (25 kn) ↓	0.1 kn	0.3 m · 10 s ↓	26.4 °C	28 °C	–	gusts
68	1.0 m	11 (27 kn) ↓	0.1 kn	0.3 m · 10 s ↓	26.5 °C	29 °C	–	gusts
70	1.0 m	11 (27 kn) ↓	0.2 kn	0.3 m · 10 s ↓	26.5 °C	29 °C	–	gusts
72	1.0 m	11 (26 kn) ↓	0.2 kn	0.3 m · 10 s ↓	26.5 °C	29 °C	0.1 mm	gusts
74	1.0 m	10 (26 kn) ↓	0.3 kn	0.3 m · 10 s ↓	26.5 °C	28 °C	0.1 mm	gusts
77	1.0 m	10 (25 kn) ↓	0.3 kn	0.3 m · 10 s ↓	26.5 °C	28 °C	–	gusts
79	1.0 m	9 (24 kn) ↓	0.3 kn	0.3 m · 9 s ↓	26.5 °C	27 °C	–	gusts
88	1.0 m	7 (21 kn) ↓	0.2 kn	0.3 m · 9 s ↓	26.5 °C	25 °C	0.1 mm	waves
90	1.0 m	6 (18 kn) ↓	0.1 kn	0.3 m · 9 s ↓	26.5 °C	24 °C	–	waves
90	1.0 m	5 (14 kn) ↓	0.0 kn	0.3 m · 9 s ↓	26.4 °C	23 °C	–	waves
89	1.0 m	5 (14 kn) ↓	0.1 kn	0.2 m · 9 s ↓	26.4 °C	23 °C	–	waves
88	1.0 m	6 (16 kn) ↓	0.2 kn	0.2 m · 9 s ↓	26.4 °C	23 °C	–	waves

Waves and swell are adjusted for this site's shelter from the coastline. Arrows point where the wind and swell go. Night hours are shaded.

Water at depth

26 °C down to about 56 m. No thermocline above that.

Suit: 3 mm wetsuit for the whole dive.

Model estimate (Copernicus Marine), updated Sat 14 Nov. High confidence.

Temperature profile and next days

Day	Surface	Warm to	Dive depth
Sat 14 Nov	26.4 °C	~56 m	26.4 °C
Sun 15 Nov	26.4 °C	~56 m	26.4 °C
Mon 16 Nov	26.4 °C	~56 m	26.4 °C
Tue 17 Nov	26.4 °C	~56 m	26.3 °C
Wed 18 Nov	26.5 °C	~53 m	26.3 °C
Thu 19 Nov	26.4 °C	~53 m	26.3 °C
Fri 20 Nov	26.2 °C	~49 m	26.2 °C
Sat 21 Nov	26.4 °C	~55 m	26.4 °C
Sun 22 Nov	26.6 °C	~55 m	26.6 °C
Mon 23 Nov	26.6 °C	~52 m	26.6 °C

~9 km model grid; nearest model water 4.9 km away, so channels and bays may differ. Daily averages; the thermocline can move several metres day to day.

Conditions at Big Mouth Cave

Big Mouth Cave is open to the sea from the SSE–NW, so waves build there when the wind blows from those directions. Land shelters it from the NNW–E.

Over the next 7 days it's good or better every day. Wed, Thu and Fri are only a trend so far.

The water is 26 °C at the surface and stays warm past 56 m, so a 3 mm wetsuit suits most dives.

Shelter

Open to SSE–NW. Waves and swell from there reach the site.

Sheltered from NNW–E: land blocks the waves.

Computed from the OpenStreetMap coastline. Wind itself is not reduced by shelter.

Location

Open Big Mouth Cave on the map21.4569, -158.2173

Nearby dive sites

Scores are today's best daylight hour.

About this forecast

Updated Sat 14 Nov, 05:30 · weather run 06Z 14 Nov · waves run 00Z 14 Nov

Waves are adjusted for this site's shelter from the coastline.

Water temperature in Hawaii

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