Awning Wind Safety: How Much Wind Can a Retractable Awning Take?
A typical residential lateral arm awning should be retracted once sustained winds reach about 20 mph (32 km/h) or gusts reach about 25 mph (40 km/h), and many lighter or very large units should come in sooner. Even awnings carrying the highest EN 13561 wind class are only tested to Beaufort 6, roughly 25-31 mph (39-49 km/h). This guide translates wind ratings into decisions, covers sensor setup, and explains how to check an awning after a wind event.
Key takeaways
- Retractable awnings are fair-weather structures. Plan to retract at Beaufort 4-5 (13-24 mph, 20-38 km/h), depending on size and rating.
- Gusts, not average wind speed, cause damage. Forecast "wind 12 mph, gusts 28 mph" is a retract day.
- Wind load grows with the square of speed: a 30 mph gust loads the fabric about 2.25 times as hard as a 20 mph wind.
- Bigger projection means much more leverage on the wall brackets. A 13 ft (4 m) projection awning should be more cautious than an 8 ft (2.5 m) one with the same rating.
- A front-bar motion sensor is the most effective protection for an unattended awning; set it sensitive, not lenient.
What awning wind ratings actually mean
The most widely used rating is the European standard EN 13561, which classifies external blinds and awnings into wind classes by testing them under a specified pressure. US manufacturers often quote a miles-per-hour figure instead, which may or may not be based on a comparable test. Our wind classes and Beaufort table has the full reference.
| Class | Test pressure | Beaufort equivalent | Approximate wind speed |
|---|---|---|---|
| 0 | No requirement | Not rated | Not rated |
| 1 | 40 N/m² | Beaufort 4 (moderate breeze) | 13-18 mph (20-28 km/h) |
| 2 | 70 N/m² | Beaufort 5 (fresh breeze) | 19-24 mph (29-38 km/h) |
| 3 | 110 N/m² | Beaufort 6 (strong breeze) | 25-31 mph (39-49 km/h) |
Three points are often misunderstood:
- The rating applies to the tested size. A model line may achieve Class 2 at moderate projections and only Class 1 at its maximum projection. Ask which size the rating covers.
- The rating assumes correct installation. Undersized anchors, a weak fascia board or a soft brick will fail long before the awning does. Wind ratings test the product, not your wall.
- Class 3 is not storm-proof. Beaufort 6 is a strong breeze: large branches moving, whistling in wires. Thunderstorm outflow gusts routinely exceed it.
If you want a quick read on whether your location and awning size suit a given rating, the wind rating checker walks through it.
When to retract: practical thresholds
Manufacturer limits vary, so your manual wins over anything here. In its absence, these are sensible defaults for residential units.
| Awning type | Retract at sustained wind | Retract at gusts |
|---|---|---|
| Lightweight or budget lateral arm, unrated or Class 1 | 12-15 mph (20-24 km/h) | 20 mph (32 km/h) |
| Quality lateral arm, Class 2, projection up to 10 ft (3 m) | 18-20 mph (29-32 km/h) | 25 mph (40 km/h) |
| Lateral arm, Class 2-3, projection 11-13 ft (3.5-4 m) | 15-18 mph (24-29 km/h) | 25 mph (40 km/h) |
| Drop arm window awning | 18-20 mph (29-32 km/h) | 25 mph (40 km/h) |
| Freestanding retractable awning | 12-15 mph (20-24 km/h) | 20 mph (32 km/h) |
| Zip-track vertical screen | Often much higher; see maker | Per maker rating |
Also retract for any thunderstorm warning regardless of current wind, because outflow gusts arrive with little notice, and for heavy rain if your fabric pitch is shallow (water pooling adds weight). Vertical zip-track screens behave very differently from awnings and are covered separately.
Why gusts and size matter more than you think
Wind pressure on a surface rises with the square of wind speed. Using the standard dynamic pressure formula (q = 0.00256 x V² in lb/ft² with V in mph), a 20 mph wind produces about 1.0 lb/ft² (49 N/m²) of dynamic pressure, while a 30 mph gust produces about 2.3 lb/ft² (112 N/m²). Actual load on the fabric depends on pitch, shape and turbulence, but the ratio holds: 50% more wind speed means roughly 125% more load.
Uplift, downdraft and direction
Wind from the open side tends to lift the fabric and front bar, pulling arms upward against their springs. Wind coming over the roof can push the fabric down and pump it up and down. Corners of buildings accelerate wind, so an awning near a corner or between two buildings sees stronger, more turbulent flow than the forecast suggests. If your awning visibly bounces at the front bar in a moderate breeze, treat its threshold as lower than the table.
Pitch matters too. Steeper pitch sheds rain better but can catch more wind from below; a very shallow pitch flaps more in downdrafts. Our guide to fixing sag and pitch covers setting it correctly.
Wind sensors: types and settings
If the awning is ever left out while nobody is home or watching, an automatic wind sensor is the single most valuable accessory. Details are in our sun and wind sensor guide; the safety-relevant points are here.
| Type | How it works | Strength | Weakness |
|---|---|---|---|
| Motion/vibration sensor on the front bar | Detects front bar movement and triggers retraction | Measures the awning's actual response, wherever wind comes from; wireless versions are easy to retrofit | Battery powered; slow to react to a sudden single gust if set lenient |
| Anemometer (cup) on the wall | Measures wind speed at the mounting point | Precise threshold in mph or km/h | Placement matters; a sheltered spot under-reads gusts at the front bar |
| Weather station combo | Wind, sun, sometimes rain | One device for full automation | Wind reading has the same placement limits |
- Set motion sensors at or near the most sensitive setting that does not cause nuisance retractions on calm days, then step back one notch.
- Mount anemometers where they see the same wind as the awning, clear of eaves, ideally above the cassette and not tucked into a corner.
- Test monthly in season: shake the front bar gently (motion sensor) or spin the cups (anemometer) and confirm it retracts.
- Replace sensor batteries annually, before the season starts.
- Understand the lockout: many systems block extension for a period after a wind event. Do not override it.
How to check an awning after strong wind
If the awning was caught out in strong wind, inspect it before using it again. Damage is often subtle and can worsen with the next extension.
- Look from a distance first. Is the front bar level? Is one arm lower than the other? Is the cassette or roller still parallel to the wall line?
- Check wall brackets. Look for cracked mortar, gaps behind brackets, bent bolts, or siding pulled outward. Any movement at the wall means stop and call a pro.
- Inspect arms. Look for kinks, cracked elbow castings, frayed arm belts or cables, and arms that no longer fold fully. Do not attempt to straighten a bent arm; replace it.
- Inspect fabric. Look for torn seams, stretched areas at the front bar and torn valance stitching.
- Test slowly. Retract and extend in stages, watching for rubbing, uneven rolling or binding. If it will not retract, see what to do when an awning won't retract.
Frequently asked questions
Can I leave my awning out overnight?
Only if the forecast is calm and you have a working wind sensor on a motorized awning. Overnight is when thunderstorms and frontal winds often arrive unwatched. Retracting at night also protects the fabric from dew and keeps it cleaner.
Does homeowners insurance cover wind damage to an awning?
Many policies cover awnings attached to the house as part of the dwelling, subject to the deductible, but exclusions vary. Insurers may question claims if the awning was left extended in forecast high winds. Check your policy wording.
Do valances or side screens increase wind risk?
A drop valance or front screen adds area that catches wind, especially from the open side. Lower your retract threshold when a drop screen is deployed, and follow the maker's limits for it, which are often lower than for the awning itself.
Are support legs or posts a good idea for windy sites?
Some makers offer removable front support posts for very wide awnings, mainly for rain load. They do not make an awning wind-rated beyond its class and must be removed before retracting. On a windy site, they are no substitute for a sensor and good habits.
Is a retractable pergola roof better in wind?
Many retractable pergola systems are supported on posts and have fabric captured in side tracks, which generally gives higher wind resistance than cantilevered lateral arm awnings. Ratings still vary widely, so compare published figures. See our retractable pergola roof guide.
How do I find my awning's wind class?
Look in the product documentation, on the label inside the cassette or on a CE declaration for European products. If no class is stated, treat it as Class 1 or unrated and retract early.
Sources and standards consulted
- Fabric mill cleaning and care instructions for solution-dyed acrylic and coated polyester (manufacturer documentation)
- Tubular motor troubleshooting and limit-setting guides (manufacturer documentation)
- EN 13561:2015 wind resistance classes (CEN)
- Beaufort wind force scale (World Meteorological Organization)
See how we research for our sourcing and verification process.