Ammonias 48 hour detailed Surf Forecast

Lat Long: 21.95° N 159.35° W

Issued: 1 am 16 Sep 2026 (local time)

Forecast update in hr min

Today's Ammonias sea temperature is

26.8°C

Ammonias surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Surf Forecasts:

How big are the waves at Ammonias today (16 Sep):

Morning surf: Morning surf (16 Sep, local time) - 2.5ft (0.8m), 18s period with SSW swell.
Afternoon surf: Afternoon surf (16 Sep, local time) - 3ft (0.9m), 18s period with SSW swell.
Evening surf: Evening surf (16 Sep, local time) - 3ft (0.9m), 18s period with SW swell.

The current surf forecast for Ammonias at 6AM is: 0.8m 18s primary swell from a South-southwest direction and 0.4m 11s secondary swell from a East direction (forecast issued at 01:00am September 16). An open ocean swell of 1.1m 7s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (HST) & Date	Wave Height	Wave Period
Morning (16 Sep)	2.5ft (0.8m)	18s
Afternoon (16 Sep)	3ft (0.9m)	18s
Evening (16 Sep)	3ft (0.9m)	18s

Table - waves today at Ammonias. (Swell directed towards the surf break)

	Short Range Forecast Heavy rain (total 28mm), heaviest during Thu night. Warm (max 27°C on Wed morning, min 25°C on Wed night). Wind will be generally light.
	Wednesday 16								Thursday 17								Friday 18
	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM
Rating (10 max)	2	0	0	1	1	0	1	0	1	1	0	0	0	0	2	2	2	1	1	2	1	2	2	1
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	SSW 19	SSW 18	SSW 18	SW 18	SW 18	SSW 18	SW 18	SSW 17	SSW 17	SSW 16	SSW 16	SW 16	SW 16	ENE 7	SSW 17	SSW 18	SSW 18	SSW 18	SSW 17	SSW 17	SSW 17	SSW 16	SSW 16	SSW 16
Wave Graph
kJ	465	418	399	449	449	541	444	386	443	412	326	258	258	443	587	659	651	637	629	608	587	566	659	539
Wind (km/h)	ENE	ENE	ENE	ENE	NE	NE	NE	NE	NE	NNE	NE	NE	NE	NE	NE	ENE	ENE	ENE	ENE	ENE	ENE	NE	ENE	ENE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross-off	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross
High Tide			7:44AM0.54m									9:00AM0.53m								10:23AM0.54m				9:42PM0.19m
Low Tide	11:40PM0.08m								00:11AM0.10m								00:58AM0.13m							9:18PM0.19m


	—	6:24	—	—	—	—	—	—	—	6:24	—	—	—	—	—	—	—	6:24	—	—	—	—	—	—
	—	—	—	—	—	6:38	—	—	—	—	—	—	—	6:37	—	—	—	—	—	—	—	6:37	—	—
mm	1	1	1	1	1	—	—	1	1	1	1	1	1	1	1	2	3	4	2	1	1	—	1	1
Temp °C	26	25	26	27	27	26	25	25	25	25	25	26	26	26	25	25	25	25	25	26	27	26	25	25
Feels °C	28	27	28	28	28	26	25	25	26	26	25	26	26	26	25	25	25	25	25	26	27	26	25	25
Swell 1 Height (m) Direction Period (s)	SSW 19	SSW 18	SSW 18	SW 18	SW 18	SSW 18	SW 18	SSW 17	SSW 17	SSW 16	SSW 16	SW 16	E 10	SSW 16	SSW 17	SSW 18	SSW 18	SSW 18	SSW 17	SSW 17	SSW 17	SSW 16	SSW 16	SSW 16
kJ	465	418	399	449	449	541	444	386	443	412	326	258	94	326	587	659	651	637	629	608	587	566	659	539
Swell 2 Height (m) Direction Period (s)	NE 8	E 11	E 11	E 11	E 10	E 10	E 10	E 10	E 10	E 10	E 10	E 10	SW 16	SSW 19	SW 10	SSE 10	SSE 10	SSE 10	SSE 10	SSE 10	SSE 10	SSE 10	SSE 9	SSW 19
kJ	45	38	37	36	33	32	50	51	51	51	71	96	258	214	15	10	10	10	9	9	9	9	8	72
Swell 3 Height (m) Direction Period (s)	E 11	SW 12	SW 12	SW 11	SW 11	SW 11	SW 11	SSE 12	SW 11	SW 11	SSW 20	SSW 19	SSW 19	SW 10	SSE 10	WSW 10	WSW 9	W 9	WSW 9	S 20	W 9	S 21	W 9	W 9
kJ	39	37	35	33	31	43	43	27	30	19	158	214	212	15	10	9	9	7	8	33	6	36	6	6
Wind waves Height (m) Direction Period (s)	NE 5	NE 7	NE 6	NE 6	NE 6	NE 6	NE 6	NE 7	ENE 7	NE 7	NE 7	NE 7	NE 7	ENE 7	ENE 7	ENE 7	ENE 7	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 8	ENE 7
kJ	23	122	112	157	157	162	167	198	269	303	284	332	342	443	475	475	498	451	445	445	398	398	384	373
Nearest Offshore or Glassy	Acid Drops HAW - Kaua'i	Acid Drops HAW - Kaua'i	Acid Drops HAW - Kaua'i	Infinities HAW - Kaua'i	Acid Drops HAW - Kaua'i	Infinities HAW - Kaua'i	PKs HAW - Kaua'i	Acid Drops HAW - Kaua'i	Acid Drops HAW - Kaua'i	Brenneckes HAW - Kaua'i	Infinities HAW - Kaua'i	Infinities HAW - Kaua'i	Infinities HAW - Kaua'i	Infinities HAW - Kaua'i	Infinities HAW - Kaua'i	Acid Drops HAW - Kaua'i	Acid Drops HAW - Kaua'i	Acid Drops HAW - Kaua'i	Infinities HAW - Kaua'i	Waimea Rivermouth HAW - Kaua'i	Majors Bay HAW - Kaua'i	Waimea Rivermouth HAW - Kaua'i	Infinities HAW - Kaua'i	Acid Drops HAW - Kaua'i
Rating (10 max)	2	2	2	2	2	2	2	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	3	3
Distance (km)	16	16	16	31	16	31	15	16	16	14	31	31	31	31	31	16	16	16	31	33	46	33	31	16
Best forecast wave conditions in Kaua'i	Majors Bay	Tunnels	Majors Bay	Majors Bay	Majors Bay	Majors Bay	Majors Bay	Majors Bay	Majors Bay	Majors Bay	Majors Bay	Majors Bay	Pakalas	Infinities	Majors Bay	Majors Bay	Infinities	Infinities	Infinities	Majors Bay	Majors Bay	Majors Bay	Majors Bay	Majors Bay
Rating (10 max)	2	2	2	2	2	2	2	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	3	3
Best forecast wave conditions in United States	Ranches HAW - Oahu	Ranches HAW - Oahu	Ranches HAW - Oahu	Point Panic HAW - Oahu	Tracks (Nanakuli) HAW - Oahu	Cape Sebastian Oregon South	Gale Point CAL - Humboldt	Tarantulas CAL - Santa Barbara	Tijuana Sloughs Baja Norte	Mouse Rock CAL - San Luis Obispo	Ghost Tree CAL - Monterey	Tracks (Nanakuli) HAW - Oahu	Gale Point CAL - Humboldt	Lincoln City Nelscott Reef Oregon North	Church CAL - Orange County	Boners CAL - San Luis Obispo	Mouse Rock CAL - San Luis Obispo	Church CAL - Orange County	Magics HAW - Big Island	Maili Point HAW - Oahu	Gale Point CAL - Humboldt	Magics HAW - Big Island	Cape Sebastian Oregon South	La Push Washington
Rating (10 max)	3	3	3	3	3	3	3	3	3	3	2	3	3	3	3	3	3	3	3	3	3	3	3	3
Header Global	Etang-Sale Reunion	Etang-Sale Reunion	Etang-Sale Reunion	Grindavik Lighthouse ( Hopsnesta) Iceland	Grindavik Antenas Iceland	JD Reef Australia	Blaketown Wedge New Zealand	Fox River New Zealand	Papatowai New Zealand	Anawhata Road (Oaonui) New Zealand	Easter Reef Australia	Graveyards New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Papatowai New Zealand	Dinner Plates New Zealand	Otago Peninsula - Allans Beach New Zealand	El Huerto Spain	Cathedral Rock Australia	Cathedral Rock Australia	Shingles New Zealand	May's Point Australia	Afife Portugal
Rating (10 max)	5	5	5	5	5	5	5	5	8	5	5	5	8	8	8	7	5	4	5	6	6	5	5	4

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

Latest Updates

Ben Mondy

Six Sun-Soaked Summer Surf Spots: Backed by 20 years of Swell and Wind Stats (and with our 20% Summer Subscription Sale)

Ben Mondy

Summer School: The Timeline of The Boardshort

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Ammonias surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

Ammonias 48 hour detailed Surf Forecast

How big are the waves at Ammonias today (16 Sep):

Short Range Forecast

Latest Updates

Road Testing the new Db Surf Roller Pro

Summer's Short. Life Is Long.

Roadsurfing in the Basque country

Six Sun-Soaked Summer Surf Spots: Backed by 20 years of Swell and Wind Stats (and with our 20% Summer Subscription Sale)

Summer School: The Timeline of The Boardshort

FREE! Surf-Forecast.com widget for your website