Koloa Landing (Whalers Cove)Poipu
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Easy protected entry; reef fish — heavy scuba-training traffic, share.
Google MapsPoipu spearfishing forecast — wind, swell, visibility, tides & live cameras
2.5
🌫 Murky all week after the storm — the water isn't settling
visibility1m
Today — sit it out — wave, wind and surge pounding. 🌫 Murky all week after the storm — the water isn't settling
Sources: IPMA · NDBC · Copernicus — high confidence · data 13:31
Sources & confidence
- Sources
- IPMA · NDBC buoys · Copernicus Marine
- Method
- Model consensus, read per window
- Freshness
- Re-read every hour, per coast
Compiled by the spearo sea-state engine
The verdict comes from seven water factors and hard safety gates — not ten tabs. Go or stay.
How we score the water
Our own model
Our own forecast engine — not a third-party widget. It weighs these water factors into one go-or-stay verdict for this coast; the 0–10 dial is that verdict, read out as a number.
- Swell & wave memory
- Height, period and direction of the swell, plus the wake of recent storms — an old storm still stirs the water, and the engine remembers.
- Wind & gusts
- Speed and gusts, hour by hour — wind speed and an onshore push chop the surface and cut visibility.
- Tide phase
- Timing and range of the tide, calibrated per coast — big spring tides pull the verdict toward caution.
- Water temperature
- Sea-surface temperature — sharply cold water vetoes a green verdict.
- Currents & outflow
- Direction and drift of the current — it pushes you, and it drags turbid coastal water across where you dive.
- Rain runoff & air clarity
- Rain muddies the water inshore through land runoff, while fog and haze cut visibility at the surface.
- Coast shape & exposure
- How the coast faces the swell — a sheltered cove keeps the water clean; an exposed, head-on point takes a penalty.
Safety gates
- Thunderstorm forecast — an instant red, no exceptions.
- An official warning (MeteoAlarm / IPMA) — yellow, or red for the higher ranks.
- Missing input data — a would-be green is capped to yellow rather than overstated.
- Strong disagreement between forecast models — a green day is pulled back to yellow.
- Night hours — forced red; the window is closed after dark.
It all folds into a single 0–10 score and one verdict: go or stay.
A forecast, not a guarantee — the sea has the last word.
Where to get in, where to hunt
Entry points with coordinates
Seabed relief — promising ground
Surface
Wind, wave and the swell windows — when to go and the best hours.
spearo.app
calmupdated 13:31
Poipu — solo, off the rocks
don't go · wave 1.8 m (occasionally up to ~3.6 m)
wave 1.8 mwind 26, gusts 55 km/hsurge pounding the rocksvisibility ~1 m
today, best window 12:00–15:00
fish · Visibility 1 m · Water 26.9°C
confidence low · verdict for the selected day
Whole week — tap a day. is driving swell right now.
Solo risk: carry a float · tell someone your plan and exit time · doubt = don't go. A model-based planner; the call is made on site.
Selected day
Windows, hours
and the day's trends.
The day is picked above, in the hero. Here are that day's windows, the hour-by-hour map and the trends. Tap a window to break down the conditions.
Wednesday · today2026-07-22
06:06–19:22 · first quarter
▼ 03:00▲ 12:00 · 0.4 m
Hours (06→20)
12
15
18
Day's trends
Tide0.54 m
Wave1.88 m
Wind24 km/h
Water27 °C
fish activity: moonset 00:30 · moderate · moon underfoot 07:20 · high · moonrise 14:06 · moderate · moon overhead 19:40 · high
Conditions window12:00–15:00
don't go fish
Hs 1.82 mperiod 10.1 swind 26→55surge 13.1viz 1 m
1.82 mup to ~3.64 · 171° at an angle
10.1 sswell building
26→55gusts 55 km/h
13.1pounding the rocks
0.31m/s
1 mrecent swell
26.9°C5 mm + hood
▼04:00tide turn near
Atmosphere4 kmprecip 0.8 mm
moderatemoonrise
- wave 1.8 m (occasionally up to ~3.6 m)
- steep wind-wave — choppy surface, careful on entry
- ebb — weaker inshore
confidence lowday
The water column
Visibility and what drives it — post-storm clearing, river plume, temperature and the thermocline.
What it is
A marine instrument,
go / no-go for solo hunting.
spearo.app folds wind, wave, swell period, visibility, tides, water temperature and risk into a single verdict — go to the spot or not. It computes 7 days ahead from open marine models (Open-Meteo, IPMA), with no sign-up and no accounts. Built for solo spearfishing off the rocks, where any mistake costs dearly.
Now live: 1152 spots across 189 stretches of coast — mainland Portugal, Madeira and the Azores.
See all spotsThe seabed
Relief and bottom type, tides, and the depths of each spot.
On the rock
The forecast is the plan.
The call is on the rock.
The models set the window. Whether you go in is read only at the water: count the sets, watch the surge on the entry. If in doubt, you don't get in.
Entry points
Where to get in
off the rocks.
Scouted entries, coloured by today. The colour is the sea state at the spot, not a guarantee: the wash and a slippery entry you judge on site.
Open the seafloor map
Lāwa'i Beach (Beach House) reefPoipu
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Coral bommies and reef with the best marine life on South Kauai.
Google MapsMahā'ulepu (Kawailoa Bay)Poipu
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Locals' Hawaiian-sling spot east of Poipu; uku, papio and goatfish.
Google MapsSOLO is the biggest risk: underwater you can black out from lack of oxygen silently and fatally, with no one around. Solo is never truly «safe». Below are the best weather windows; carry a buoy, tell someone your plan and exit time, and any doubt — don't go.
Surfacing
Cameras, map and reference — to hand as you come up.
Live cameras, map & reference
Cameras · live
Look at the water
right now.
Check the cam BEFORE you leave. Foam, brown/green murk, or waves washing the entry rocks = No-go. At night/in fog the cam is useless — treat it as «unknown», NOT «green».
Reference
What's in season,
what the law says.
In season now
- uhu (parrotfish)Uhu (parrotfish), Maui: ≤2/day, 10–14″ min; taking blue (terminal) males is PROHIBITED.
- ulua (giant trevally)
- kumu (goatfish)
- roi (peacock grouper)Invasive — removal encouraged, no limit. Roi can carry ciguatera — a health caution.
- ta'ape (bluestripe snapper)Invasive — removal encouraged, no limit. Roi can carry ciguatera — a health caution.
Law
- ✓No licence for residents; non-residents need the Nonresident Recreational Marine Fishing License ().
- ✓MLCDs — no-take. West Hawai'i — scuba-spear banned. Uhu (Maui): ≤2/day, no blue males. Roi/ta'ape invasive — removal encouraged.
- ⛔ 🚫 Marine Life Conservation Districts (Hanauma/Molokini/Pupukea etc.) — no-take: spear nothing. West Hawai'i — scuba-spear banned.
- ⛔ 🚫 Sea turtles, monk seal and cetaceans — protected, don't disturb. Uhu: blue terminal males (Maui) may not be taken.
US spearfishing law is state-by-state. License, spearable species, powerhead rules and distances vary; federal sanctuaries (Gray's Reef, the Keys, Flower Garden Banks) ban spearfishing. Always confirm with the state agency and local ordinances.
Safety protocol
- Sets: watch the wave trains ≥15 min before entering; Hmax ≈ 2×Hs, the wash can run 50 m past the foam line. A lull >10 min with period >12 s = a big set «overdue», do NOT enter; enter right after a full set passes and re-check at minute 30.
- Exit FIRST: find your exit AND a backup before entering. On a rocky/boulder shore a 0.5 m rise in swell can make the exit impossible — getting pinned/unable to climb out is the main killer.
- Headland rip: prominent points often have a permanent topographic rip regardless of the model — locate it, enter/exit on the windward side, never swim against it.
- Cold: wetsuit per the SST chip; the first shiver = a metabolic surge and a drop in breath-hold → get out at the first steady shiver. Cap the session at 45–60 min below 15 °C.
- Solo discipline: buoy up; tell someone the spot and exit time; conservative breath-hold (never push it in cold/murky/surfy water); visibility <3 m — don't enter.
- Afternoon wind: on many coasts the wind builds from midday — plan to be out of the water by midday; the chop builds — get out.
- UV 11:00–15:00 (UVI ≥6): sunscreen and cover up on the surface interval.
- Solo is a fundamental risk (hypoxic blackout with no buddy). Any doubt = No-go.
Spearfishing in Poipu: spots, seasons and rules
Spearfishing in Poipu is small-scale reef work, not blue-water hunting. Mahaulepu is the local Hawaiian-sling style option for uku, papio and goatfish. Lawai Beach has coral bommies and heavy marine life. Koloa Landing is the easiest protected entry, but scuba training traffic is common. The safest plan is an early water check, a visible float and a low-impact approach that leaves crowded reef patches alone.
TL;DR
- Poipu is sheltered South Kauai reef diving, with Mahaulepu, Lawai Beach and Koloa Landing as the listed entries.
- South swell still matters: 150-240 degrees can wrap into the reef, and 200 degrees is the direction to watch.
- Hawaii residents do not need a marine recreational license; nonresidents need the NRMFL.
- MLCDs are no-take, turtles and monk seals are protected, and roi or taape carry invasive and food-risk notes.
Best spearfishing spots in Poipu
The best Poipu spot is the one with clean water and room. These entries are close to shore, shared with snorkelers or divers, and sensitive to south swell. If protected animals are present or people fill the reef, make it a scouting swim.
| Spot | Type | Depth | Level | Access | Notes |
|---|---|---|---|---|---|
| Mahaulepu (Kawailoa Bay) | Reef and lava-rock bay | Shallow to moderate reef | Intermediate | Shore approach east of Poipu | A local sling-style area for uku, papio and goatfish. Do not force an exit over exposed reef. |
| Lawai Beach (Beach House) reef | Coral bommies | Shallow reef pockets | Intermediate | Beach entry near Lawai | Rich marine life and snorkel traffic. Keep shots selective and avoid coral contact. |
| Koloa Landing (Whalers Cove) | Protected reef entry | Shallow reef | Accessible but crowded | Easy shore entry | Good entry, heavy scuba classes. Share the water and keep the gun controlled. |
When is Poipu most diveable?
The area is sheltered, but south swell from 150-240 degrees can still wrap in. Because Hawaii has a micro-tide regime, swell and wind usually matter more than tide height. NOAA station 51208 is the listed offshore check for Kauai energy.
What fish are realistic?
The local list includes uhu, ulua, kumu, roi and taape. Roi and taape are invasive and removal is encouraged, but roi can carry ciguatera risk. Be conservative with uhu, and never mistake protected animals or reef life for harvest targets.
What Hawaii rules apply?
Nonresidents need the Nonresident Recreational Marine Fishing License; residents do not need a marine recreational license. MLCDs are no-take, and any uncertain boundary should be treated as closed. Sea turtles, monk seals and cetaceans must not be disturbed.
How should you share the reef?
Poipu entries are social water. Keep the float visible, point the gun down around snorkelers, and pass on shots that would send fish or shaft toward coral, students or blind corners.
FAQ
Do nonresidents need a Hawaii license?
Yes. Nonresidents need the NRMFL.
Can I spear inside an MLCD?
No. Marine Life Conservation Districts are no-take.
Is Koloa Landing beginner-friendly?
The entry is easy, but scuba traffic makes awareness essential.
Which NOAA station fits Poipu?
NOAA NDBC station 51208 is the listed reference.
Are roi and taape good targets?
They are invasive, but roi can carry ciguatera risk.
Sources
Nearby towns
Coming soon
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