KSMO Santa Monica Muni

WIND_INFERRED 90%

Runway 21 — favored by the wind (3 kt at 230° true)

Based on wind only — no traffic or ATIS to confirm. No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency.

certainty: 90% evidence: NONE Class D

Wind 230° true at 3 kt · VFR · 20 min old

▶ Listen live — ATIS/CTAF on LiveATC opens LiveATC’s own player · verify the broadcast yourself

21 90% 3500 ft · 3 kt head, 0 kt x-right

3 10% 3500 ft · 3 kt TAIL, 0 kt x-left · right traffic

Why — evidence behind this answer

Runway 21

PRIOR 21 used 91% of the time in this wind bin (n=64) +1.50
WIND 3 kt headwind, 0 kt right crosswind 20 min ago +0.13

Runway 3

WIND 3 kt TAILWIND, 0 kt left crosswind 20 min ago -0.36
PRIOR 3 used 9% of the time in this wind bin (n=64) -0.18

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	20 min
ADSB	OK	1 min	GOOD
NOTAM	OK
CIFP	NOT_CONFIGURED		Instrument procedures: phase 4

Recent operations

No operations observed in the last hour.

Was this right?

KSMO field & runways

Santa Monica Muni, Santa Monica, California. Field elevation 170 ft. Class D airspace. Towered. Magnetic variation 12.0°E on record, 11.4°E today.

The FAA's variation of record is the number this field was surveyed against; the second is where north points now, from WMM2025. It is moving 0.078°/year west — about 1° every 13 years — which is why runway numbers eventually stop matching their pavement.

Runway data from the FAA NASR 01 Oct 2026 cycle. Where NASR locates both thresholds, the true heading is the bearing between them rather than NASR's whole-degree alignment. Magnetic is that heading against *today's* declination from WMM2025, not the field's variation of record — so it can differ from the chart by the gap between the two shown above. The number painted on the runway is the one ATC uses.
Runway	True	Magnetic	Number	Length	Surface	Pattern	Notes
21	224.4°	213.1°	matches rule gives runway 22 in ~25 yr	3,500 ft	ASPH	left
3	44.4°	33.1°	matches rule gives runway 4 in ~25 yr	3,500 ft	ASPH	right

What KSMO usually does

Of 3,416 operations this service has observed at KSMO since 2026-08-25:

21 91% 3116 ops
3 9% 300 ops

Observed by this service only — not an FAA statistic, and biased toward the hours and days it has been watching. It is shown because it is the same history the engine learns its local-convention prior from.

Generated 08:11:09Z · auto-refreshes · JSON

KSMO ☆ Santa Monica Muni