S31 Lopez Island Airport | Runway, Pattern, Tower

Before you fly into S31

Conditions

VFR

Good for visual flying

Airport

Non-towered

Self-announce on CTAF

Pattern alt

1,208.8'

MSL · field 208.8' + 1,000 AGL

Favored RWY

RWY 16

H/W +4 · X/W 3 kt L

METAR & TAF S31

Current METAR

Observed 23:55Z

KS31 272355Z AUTO 15005KT 10SM FEW038 OVC046 13/09 A3001 RMK AO2 T01310086 10141 20107 50000

Wind: 150° @ 5 kt
Visibility: 10 SM
Temp / Dew: 13°C / 9°C
Altimeter: 30.01 inHg
Clouds: OVC
Density alt: -93 ft
Ceiling: 4,600 ft AGL
Rules: VFR

S31 does not issue a TAF.

Showing the forecast from the nearest station: CYYJ (VICTORIA INTL) · 21.8 NM away. Conditions at S31 may differ.

Forecast · TAF

Valid 28 00:00Z–29 00:00Z

TAF CYYJ 272340Z 2800/2824 13012KT P6SM SCT040 TEMPO 2800/2806 BKN040 BECMG 2802/2804 21008KT FM280600 27005KT P6SM SCT030 FM280900 25005KT P6SM SCT015 OVC030 TEMPO 2809/2819 BKN015 OVC030 BECMG 2817/2819 14006KT FM282000 14008KT P6SM FEW020 BKN040 RMK NXT FCST BY 280600Z

BASEVFR

28 00:00Z–28 02:00Z

Wind: 130° at 12 kt
Visibility: ≥ 6 SM
Sky: Scattered 4,000 ft
Weather: None forecast

00Z

03Z

06Z

09Z

12Z

15Z

18Z

21Z

00Z

NOW

How to read

The top lane is always the active baseline (BASE + FM). Secondary lanes stack temporary and probabilistic deviations in the order they appear in the TAF.

Tap any pill to see the decoded conditions for that period.

Change indicators

BASEBase

Initial conditions at the start of the forecast.

FMFrom

A new baseline that replaces the previous forecast completely, starting at the stated time.

BECMGBecoming

Conditions change gradually over the window shown. By the end, the new conditions apply.

TEMPOTemporary

Fluctuating conditions lasting less than an hour at a time within the window — not the dominant forecast.

PROB30/40Probability

30 or 40% chance of the conditions occurring within the period. Never combined with BECMG.

Airport info & contacts

Manager on record, flight service, ARTCC, attendance schedule and pattern altitude — published by the FAA and refreshed every 28 days.

Location

From city: 3 NM N
VFR sectional: SEATTLE
ARTCC: ZSE · SEATTLE
NOTAM facility: SEA (NOTAM-D)

Airport manager

Name: WIL CATLIN
Phone: 360-468-4116
Address: PO BOX 907, LOPEZ WA 98261

Flight service · Hours

FSS SEA: SEATTLE1-800-WX-BRIEF
Attendance: Unattended

Frequencies

Tap any row to copy the frequency to your clipboard.

Advisory / CTAF

Runways & pattern

Full page

Runway & wind

tap a runway

150° · 5 kt

See full METAR & TAF

RWY 16

159°M

Head/Tail

+4 kt

Crosswind

3 kt L

Pattern entry · RWY 16

RIGHT TRAFFIC

Runway	Heading (°M)	Length	Surface	Traffic
16/34Favored	159° / 339°	2,905 ft	ASPH	16 R

Runway end performance

End	TORA	TODA	ASDA	LDA	VGSI	Approach lights	Obstruction
16	—	—	—	—	PAPI 2-box left(4°)	—	87', trees, 1948' from thr, 0' R of cntrln, slope 20
34	—	—	—	—	PAPI 2-box left(4°)	—	60', trees, 900' from thr, 0' R of cntrln, slope 11

Declared distances in feet. TORA = takeoff run available, TODA = takeoff distance, ASDA = accelerate-stop, LDA = landing distance.

Airport sketch

Runways drawn to scale from FAA survey coordinates, rendered over live satellite imagery. Not for navigation.

Approaches & charts

Chart Supplement

S31 · CHART_SUPP

Chart Supplement

S31 · CHART_SUPP

Services on the field

Fuel grades, oxygen, maintenance, ramp storage and lighting — as declared to the FAA by the airport operator.

Fuel & services

Fuel: Not available
Oxygen (bottled): Not available
Oxygen (bulk): Not available
Airframe repair: Not available
Power plant repair: Not available
Other services: AFRT,CHTR

Ramp & ground

Transient storage: Tie-down
Landing fee: Yes
Customs: Not available
Beacon schedule: SS-SR
Beacon: White / Green (civil land)(WG)
Wind indicator: Lighted
Segmented circle: Yes

Fuel & FBOs

Cheapest 100LL and Jet A on the field and nearby. Always confirm with the FBO before taxi.

Cheapest 100LLNearby

$6.54

38W·Lynden Municipal Airport·34.1 nm

Cheapest Jet ANearby

$7.22

S43·Snohomish Flying Service·48.2 nm

No on-field FBO prices. See nearby fuel options below.

Cheaper nearby (within 50 nm)

100LL$6.54at38WLynden Municipal Airport34.1 nm
Jet A$7.22atS43Snohomish Flying Service48.2 nm

Airport notes

Surface conditions, obstructions, local procedures, lighting outages and other notes published with each FAA cycle.

General notes

For clearance delivery contact Whidbey Approach at 360-257-3310.Show FAA
Runway 16/34 has soft shoulders and thresholds.Show FAA

Runway surface & condition

16/34Taxiways are marked with reflectors.Show FAA

Other notes

Established prior to 1959.Show FAA

VFR map & nearby airports

VFR sectional. Tap any ICAO chip to open that airport.

Key facts · S31

Answer card

ICAO: S31
Name: LOPEZ ISLAND
Location: LOPEZ, WASHINGTON
Elevation: 208.8 ft MSL
Traffic pattern altitude: 1,208.8 ft MSL (1,000 AGL)
Control tower: Non-towered (use CTAF)
Total runways: 1
Longest runway: 16/34 · 2,905 ft
Published ILS approaches: 0
Published frequencies: 1
Magnetic variation: 21°
Current flight rules: VFR
Current wind: 150° at 5 kt
Favored runway now: RWY 16

Lopez Island Airport sits on Lopez Island in Washington. Field elevation is 208.8 ft MSL. The airport has one runway. Runway 16/34 is 2,905 ft long with asphalt pavement. There is no control tower. CTAF is 128.25. No ILS approaches are published here. Pattern altitude is not published in the facts, so use the standard 1,000 ft AGL for light piston traffic unless the current FAA Chart Supplement says otherwise.

This is a small island field with no on-field FBOs listed in the facts. Plan on self-sufficiency. For clearance delivery, contact Whidbey Approach at 360-257-3310. The published remarks also note soft shoulders and thresholds on Runway 16/34. Taxiways are marked with reflectors. That matters if you are arriving at dusk or in low visibility. The airport was established prior to 1959, so expect a field that is built for practical local use rather than heavy instrument traffic. With no tower and no published ILS, a first-time pilot should review the current Chart Supplement before departure and pay close attention to runway condition, local traffic and island weather.

Frequently asked questions

What is the runway at S31 Lopez Island Airport?

S31 has one runway. Runway 16/34 is 2,905 ft long with asphalt pavement. The published headings are magnetic.

Does Lopez Island Airport have a control tower?

No. S31 is non-towered. Use CTAF 128.25 and make standard position reports.

Is there an ILS at S31?

No ILS approaches are published for S31. Check the current FAA Chart Supplement for the latest approach options before you go.

What is the pattern altitude at Lopez Island Airport?

The facts do not publish a pattern altitude for S31. Use the standard 1,000 ft AGL for light piston traffic unless the current FAA Chart Supplement says otherwise.

Which FBOs are on the field at S31?

No on-field FBOs are listed in the facts. FBO options vary. Contact the airport operator directly before arrival, or call the field on CTAF/UNICOM for current FBO availability.

Who do I contact for clearance delivery at Lopez Island Airport?

For clearance delivery, contact Whidbey Approach at 360-257-3310. Verify current procedures before flight if you need IFR handling.

Are there any runway cautions at S31?

Yes. The published remarks say Runway 16/34 has soft shoulders and thresholds. Taxiways are marked with reflectors, so use extra caution during low light operations.

What should a first-time pilot know before landing at S31?

Plan for a small island airport with no tower and no published ILS. Check the current FAA Chart Supplement for any additional local procedures before departure. Be ready for weather and runway-condition changes that can matter more than at a larger field.

S31