Ammonias Surf Forecast and Surf Reports

(Kaua'i, USA)

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Ammonias Surf Guide

Ammonias in Kauai is an exposed reef break that has fairly consistent surf. Summer offers the best conditions for surfing. Offshore winds blow from the northwest. Waves just as likely from local windswells as from distant groundswells and the ideal swell direction is from the south southeast. A reef breaks right. When the surf is up, crowds are likely Submerged rocks are a hazard.

Ammonias Spot Info

Type:	Rating:	Reliability:	Todays Sea Temp*:
Reef	2	fairly consistent	24.3°C*ocean temperature recorded from satellite

Surfing Ammonias:

The best conditions reported for surf at Ammonias occur when a South-southeast swell combines with an offshore wind direction from the Northwest.

Hourly Forecast

16 Day Forecast

What's the best time of year to surf Ammonias (for consistent clean waves)?

mayBest Season: spring

The best time of year for surfing Ammonias with consistent clean waves (rideable swell with light / offshore winds) is during Spring and most often the month of May. Clean surfable waves are typically found 3% of the time in May while 15% of the time it tends to be blown out. For the remaining 82% of the time it is considered too small by most surfers but may still be OK for beginners and groms at times.

clean

Surfable waves that hold up well for longer rides in prevailing cross-offshore, offshore or light wind conditions.

blown out

15%

Surfable sized waves that are of poorer quality due to prevailing onshore, cross-onshore or windy conditions (may be preferable for kitesurfing).

too small

82%

Waves usually considered too small for good surf. Some wave-magnet breaks may still work though if conditions are right (on occasion).

Explore Ammonias Location Map

Interactive Ammonias surf break location map. View information about nearby surf breaks, their wave consistency and rating compared to other spots in the region. Current swell conditions from local buoys are shown along with live wind speed and direction from nearby weather stations. Click icons on the map for more detail. The closest passenger airport to Ammonias is Lihue Airport (LIH) in Usa Kauai Isl., 3 km (2 miles) away (directly). The second nearest airport to Ammonias is Barking Sands Pmrf Airport (BKH), also in Usa Kauai Isl., 46 km (29 miles) away.

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Please note that some surf spot locations are approximate to protect their exact location while others are not shown at close zoom level.

Ammonias Surf Forecasts:

Hourly Forecast

16 Day Forecast

Todays Surf Summary
Wednesday, 6 May 2026, 16:28 Local Time

m, °C	Wednesday 06			Thu
ft, °F	5PM	8PM	11PM	2AM
Wave (m)	SSW	SSW	SSW	SSW
Period (s)	16	16	16	16
Wind (km/h)
Wind State	cross- off	cross	cross- off	cross

Tides at Ammonias

Current tide and informaton

For Nawiliwili, Hawaii, 1 km from Ammonias.

Next High Water: 07:37pm | 0.52m

Next Low Water: 11:57am | 0.05m

NEXT	IS AT (local time)	remaining
high tide
low tide

Ammonias Sea Temperature

Sunny with pleasantly warm air temperatures (feeling like 24.0 °C once we account for wind), and similar sea temperatures (24.3 °C). Wear boardshorts or a shorty, or better still a thin summer wetsuit to keep the UV off.

Today, many surfers would wear a shorty.

Current Temp*: 24.3°C*ocean temperature recorded from satellite

View Sea Temp Map

Swell History at Ammonias

Surf stats for Ammonias, see the swell variation by month or season on the history page here.

Average Swell

View Swell Statistics

Wind History at Ammonias

Wind stats for Ammonias, see the variation in direction and stength by month or season on the history page here.

Average Wind

View Wind Statistics

Ammonias Reviews:

Interactive Porthcawl Point location map. View nearby buoy information, live wind conditions and surrounding roads, paths and locations to help find new breaks. Click the buoys or wind icon to view more information.

Ratings

Based on 2 votes.

Overall:2.0
Quality on a good day:3.5
Consistency of Surf:2.0
Difficulty Level:3.5
Wind and Kite Surfing:1.0
Crowds:3.0
...

See all 18 ratings

Review

Impartial reviews submitted by Surf-Forecast users.

Kanaka from United States

“The ideal swell direction is *not* S-SE: you'll get some wraparound but the ideal direction is E-NE or NE Groundswell from big low pressure systems or after the tradewinds have been blowing strong for several days. It doesn't break very often at size but when it's big, it's advanced and experts only as many of the best surfers on the island show up.

This is no tourist spot. It's very localized with a small take off area and I've seen even veteran transplants get kicked out of the water. At size, it can be a world class albeit short wave. Ammonias is powerful, hollow, and machine-like when it's on.”

Other Nearby Breaks Closest To:

Discover surf breaks near Ammonias. Click below to view there surf guides.