Surf Report — Sat Sep 12, 2026

Issued 8:57 AM EDT · Beach 90th · Ditch Plains · Matunuck · Pt Judith

1 · Long-range outlook (all days)

DayOutlook
Travel signal✈ Ditch Plains Sun 9/13→Mon 9/14 (§2) · ✈ Ditch Plains Thu 9/17→Fri 9/18 (§2) · ✈ Matunuck Sun 9/13→Mon 9/14 (§2)
What changes the callFlood Watch late tonight→Sun AM (heavy downpours, t-storms) wipes out Sunday. Mon 9/14 is the week's window: strong NW offshore behind the front, Ditch + Pt Judith ★. Far cast: GFS spins a coastal low ~Tue 9/22 (nor'easter signature) but ECMWF disagrees — low confidence watch.
Sat 9/12Small and softE 5–10 kt → SE this afternoon, seas ~2 ft. Best of a weak day: Ditch 1–2 ft @ 7s Poor, Pt Judith 1–2 ft @ 6s P2F; Rockaway 1–2 ft @ 6s Poor with 1–2 ft on the cam. Buoys confirm the S swell is nearly gone (0.5–0.6 m). Surfline rates today Poor everywhere except Pt Judith (P2F).
Sun 9/13Washout — Flood WatchS 10–15 kt gust 20, showers/t-storms with heavy downpours, Flood Watch through midday. 2–3 ft @ 5s windswell, messy and onshore — not a surf day.
Mon 9/14Window #1 ★Strong NW offshore 10–20 kt behind the front meets 2–3 ft @ 6s S swell. Ditch 3→2 ft ★, Pt Judith 3→2 ft ★ — clean, the best waves of the 9 days. Gusty (20+ kt at Ditch in the AM).
Tue 9/15NE junkNE 10–15 kt gust 20, 2→1 ft @ 5s ENE windswell. Cross-shore and short-period — Poor.
Wed 9/16Small1–2 ft @ 6–7s ESE, light/variable to onshore wind. Poor.
Thu 9/17OnshoreOnshore flow builds, 2 ft @ 6s SE. Poor.
Fri 9/18Veering2 ft @ 5s S, wind veers onshore→offshore through the day. Poor.
Sat 9/19Offshore AM2 ft @ 6s SE, offshore morning → onshore afternoon. Poor to Fair.
Sun 9/20Building windswellS windswell builds to 3–4 ft @ 5s, light/variable wind. Bigger but short-period — Poor to Fair, watch.
Far cast · days 10–16GFS spins a coastal low ~Tue 9/22 (Ditch 44 kt SE, 988 mb — nor'easter signature) but ECMWF shows nothing; low confidence. Strong high Fri 9/25+ looks quiet.

No active storm systems — high pressure dominates. Daily tropical + coastal-low scan continues.

Trip watch — 2+ consecutive decent days in one grid (★ window or Poor-to-Fair+, min 2 ft on that grid’s heights, not all-day onshore; trip spots only)
SpotDaysWhy it qualifies
✈ Ditch PlainsSun 9/13 → Mon 9/14 (§2)Sun: Poor · Poor to Fair · 2–3 ft @ 5s (§2)
Mon: ★ · Poor to Fair · 3→2 ft @ 6s (§2)
✈ Ditch PlainsThu 9/17 → Fri 9/18 (§2)Thu: Poor · Poor to Fair · 2 ft @ 6s (§2)
Fri: Poor · Poor to Fair · 2 ft @ 5s (§2)
✈ MatunuckSun 9/13 → Mon 9/14 (§2)Sun: Poor · Poor to Fair · 2–3 ft @ 5s (§2)
Mon: Poor to Fair · Poor to Fair · 2–3 ft @ 5s (§2)

2 · The grid — 10 days × 4 spots (fused call)

Beach 90thDitch PlainsMatunuckPt Judith
Sat 9/12
1–2 ft @ 6s
var 4on 9on 10
Poor
1–2 ft @ 7s
var 2x 7on 6
Poor
1–2 ft @ 7s
var 2x 5on 5
Poor
1–2 ft @ 6s
var 2var 4on 5
Poor to Fair
Sun 9/13
2–3 ft @ 5s
on 11on 9x 7
Poor
2–3 ft @ 5s
on 12on 10x 6
Poor
2–3 ft @ 5s
var 5on 10var 6
Poor
2–3 ft @ 5s
var 5on 11off 8
Poor
Mon 9/14
1–2 ft @ 6s
off 10off 9off 12
Poor to Fair
3→2 ft @ 6s
off 21off 11off 13
2–3 ft @ 5s
off 10off 7var 4
Poor to Fair
3→2 ft @ 6s
off 11off 8off 6
Tue 9/15
1 ft @ 6s
off 8x 6on 8
Poor
2→1 ft @ 5s
x 17x 13x 11
Poor
2→1 ft @ 5s
off 7x 5x 6
Poor
2→1 ft @ 5s
off 10x 8x 9
Poor
Wed 9/16
1 ft @ 6s
var 3on 5on 6
Poor
1–2 ft @ 7s
x 9var 5var 4
Poor
1 ft @ 6s
var 3var 4var 4
Poor
1 ft @ 6s
off 5on 5on 5
Poor
Thu 9/17
1–2 ft @ 6s
var 3on 7on 10
Poor
2 ft @ 6s
var 4on 8on 12
Poor
1–2 ft @ 6s
var 2on 7on 7
Poor
1–2 ft @ 6s
var 3on 8on 9
Poor
Fri 9/18
1–2 ft @ 5s
x 7off 9var 4
Poor
2 ft @ 5s
on 14off 13off 10
Poor
2 ft @ 5s
on 7x 7off 5
Poor
2 ft @ 5s
x 10x 8off 6
Poor
Sat 9/19
1–2 ft @ 5s
off 6var 2on 6
Poor
2 ft @ 6s
off 13var 3on 9
Poor to Fair
1–2 ft @ 5s
var 4var 0on 6
Poor
2 ft @ 6s
off 6var 2on 9
Poor to Fair
Sun 9/20
2–3 ft @ 5s
off 6var 4x 5
Poor to Fair
3–4 ft @ 5s
off 8var 4on 6
Poor to Fair
3–4 ft @ 5s
var 4var 2var 4
Poor to Fair
3–4 ft @ 5s
off 6var 1var 4
Poor to Fair

Each cell: surf · wind morning → midday → evening (GFS model) · call. Surf heights with → show the morning → evening trend: 1→3 ft = building, 3→1 ft = fading. Plain ranges (1–2 ft) = steady. Period is the dominant swell. ★ = best window. Green row = window day, amber = watch. Green-outlined cells = Trip watch runs detected in this grid (2+ consecutive decent days, over 2 ft). Wind is the GFS model (same feed as Windy’s GFS layer), blended with NWS marine guidance on days 1–3 — Surfline’s model wind is in §3.

3 · Surfline grid — LOTUS model

Very PoorPoorPoor to FairFairGood (hand-assigned)
Beach 90thDitch PlainsMatunuckPt Judith
Sat 9/12
0–2 ft
on 8–10on 9–10on 11–12
0–2 ft
off 9–10x 8–9on 8–9
0–1 ft
x 6–11on 6–7on 6–9
0–1 ft
on 7–9on 7–8on 7–10
Sun 9/13
1–2 ft
on 18–31x 10–22x 7–10
1–3 ft
on 12–21on 14on 9–15
0–3 ft
on 9–19on 5–8x 6–9
0–2 ft
on 9–13on 5off 8–9
Mon 9/14
0–2 ft
off 13–15off 12–14off 17
1–3 ft
off 20–25off 17–19off 8–11
0–2 ft
off 14–23off 14–17off 9–12
0–2 ft
x 14–23x 14–17x 9–12
Tue 9/15
1–2 ft
x 11x 11on 9
1–3 ft
off 16off 14x 12
0–2 ft
off 15–16x 11–12on 11
0–2 ft
on 15–16on 11–12on 11
Wed 9/16
1–3 ft
on 5on 6on 7
2–3 ft
off 9x 7x 5
0–2 ft
x 6on 4on 3
0–2 ft
on 6on 4x 3
Thu 9/17
1–2 ft
on 4on 8on 14–15
1–3 ft
on 5on 5on 8–11
0–2 ft
on 4–5on 7on 11–14
0–2 ft
off 4–5x 7x 11–14
Fri 9/18
1–2 ft
off 6–7off 5x 7
1–2 ft
x 8–11off 8off 5
0–1 ft
off 7–10off 5–6x 13
0–1 ft
off 7–10x 5–6on 13
Sat 9/19
1–3 ft
x 18–19x 18x 17–18
1–4 ft
x 20–21x 16x 16
0–2 ft
x 13–14on 13on 12–13
0–2 ft
on 13–14on 13on 12–13
Sun 9/20
1–2 ft
off 9off 7off 7–8
2–4 ft
off 13off 7off 10–11
1–2 ft
x 14–15x 11–13off 12
1–2 ft
on 14–15on 11–13on 12

One dot per part of day (morning / midday / evening). Green-outlined cells = Trip watch runs detected in this grid (2+ consecutive decent days, over 2 ft). Model run Sep 11, 2am EDT. Wind is Surfline's structured wind feed (speed–gust kt per daypart, Surfline's own offshore / onshore / cross-shore labels); heights from the public daily strip. Ratings: today's are live; future-day ratings sit behind Surfline Premium and keep the morning read.

4 · Commentary

Far cast detail — days 10–16 (pattern watch):

5 · Raw data

44025 Long Island0.5 m @ 6 s S, fallingdown from 0.7 m @ 7 s SSE yesterday afternoon; S swell nearly gone
44097 Block Island0.6 m @ 7 s SSW, steadyholding just under yesterday's 0.7 m; RI shelf still robbing energy
44065 NY Harborno wave data; wind SE 6 kt, 1020.2 hPaharbor mouth calm; best Rockaway proxy shows light onshore drift
44017 MontaukofflineHTTP Error 404 — fifth day down

Beach 90th smart cam: 1–2 ft knee-to-thigh this morning (latest reading; page did not timestamp it). No public cam obs at the other three spots.

Montauk (Ditch)Sandy Hook (Rockaway)Newport (RI)
Sat 9/12L 4:29a · H 10:15a · L 5:01p · H 10:37pL 3:13a · H 9:16a · L 3:33p · H 9:30pL 2:30a · H 9:14a · L 2:58p · H 9:34p
Sun 9/13L 5:08a · H 11:01a · L 5:48p · H 11:23pL 3:53a · H 9:58a · L 4:17p · H 10:13pL 3:01a · H 9:58a · L 3:38p · H 10:17p
Mon 9/14L 5:48a · H 11:47a · L 6:38pL 4:30a · H 10:41a · L 4:58p · H 10:58pL 3:34a · H 10:42a · L 4:16p · H 11:01p
Tue 9/15H 12:12a · L 6:31a · H 12:37p · L 7:32pL 5:06a · H 11:25a · L 5:40p · H 11:45pL 4:09a · H 11:27a · L 4:54p · H 11:47p
Wed 9/16H 1:03a · L 7:20a · H 1:29p · L 8:27pL 5:41a · H 12:12p · L 6:25pL 4:46a · H 12:14p · L 5:36p
Thu 9/17H 1:56a · L 8:16a · H 2:24p · L 9:23pH 12:36a · L 6:20a · H 1:01p · L 7:18pH 12:35a · L 5:27a · H 1:03p · L 6:27p
Fri 9/18H 2:50a · L 9:13a · H 3:23p · L 10:19pH 1:28a · L 7:09a · H 1:51p · L 8:22pH 1:25a · L 6:15a · H 1:54p · L 7:44p
Sat 9/19H 3:50a · L 10:12a · H 4:27p · L 11:14pH 2:21a · L 8:16a · H 2:43p · L 9:28pH 2:16a · L 7:20a · H 2:47p · L 9:27p
Sun 9/20H 4:56a · L 11:10a · H 5:30pH 3:16a · L 9:28a · H 3:38p · L 10:26pH 3:10a · L 8:43a · H 3:47p · L 10:27p

NHC 8 AM EDT — tropical cyclone formation not expected in the next 7 days; no development areas. Water 70–74°F. Strengthening El Niño (>90% chance of a very strong event fall/winter 2026–27) keeps suppressing the late hurricane season; the fall nor'easter season is the one to watch — GFS hints a coastal low ~Tue 9/22 (see far cast), ECMWF disagrees.

NWS forecast discussion (human forecaster):
OKX 7:36 AM: tranquil today gives way to a southern-stream shortwave tapping tropical moisture — showers with heavy downpours, a few t-storms, isolated/scattered flash flooding late tonight into Sun AM. Flood Watch: NYC metro/NE NJ 2–10 AM Sun; Long Island/coastal CT 5 AM–2 PM Sun. BOX 7:21 AM: Flood Watch for RI + SE MA Sunday — showers with pockets of torrential rain early Sun AM into the afternoon. Marine: E 5–10 kt → SE this afternoon, seas ~2 ft; Sun S 10–15 kt gust 20 with t-storms, seas 2–3 ft; Mon NW 10–15 kt gust 25 behind the front.

6 · Scorecard

Fri 9/11: (a) front timing — passed early AM as called, harbor wind backed N→WSW ~8 kt by afternoon ✓. (b) wind — E→SE afternoon shift matched NWS; Ditch cross-shore call held ✓. (c) buoys — 0.9 m @ 7 s AM → 0.7 m mid-afternoon → 0.5–0.6 m this morning: decay as called ✓. (d) cam — Beach 90th 1–2 ft knee-to-thigh vs 2→1 ft ★ call: close, soft end of range ✓. Bias note: Pt Judith ran 1–2 ft vs grid's 3→2 ft — RI east spots overcalled again; today's Pt Judith fused capped at 2 ft.