How Seasonal Changes Affect Your Acne (And When to Switch Products)

If you've noticed that your skin seems to have a mind of its own depending on the time of year, you're not imagining it. Acne does fluctuate with seasons, and there's actual science behind why.

A study in the Dermatology Online Journal found that acne tends to worsen in summer and improve in winter for many people, though the pattern reverses for some [1]. Temperature, humidity, UV exposure, sweat production, and even allergens all shift throughout the year, and your skin responds to every one of those changes.

The mistake most people make is keeping the exact same routine year-round and then wondering why it stops working in July or leaves them flaking in January. Your skin's needs change. Your routine should change with them, at least a little.

Spring: the transition season

Spring is when things start to shift, and it's the season that catches people off guard. Here's what happens:

Increased humidity. After months of dry winter air, spring brings more moisture. If you've been using a heavy moisturizer all winter, you might notice it suddenly feels too thick. Your skin is producing more oil as temperatures rise, and heavy cream on top of that equals clogged pores.

Pollen and allergies. Seasonal allergies cause inflammation, and inflammation affects your skin. Some people notice acne flares during high-pollen seasons, possibly because the systemic inflammatory response worsens skin inflammation too. Antihistamines can help, but some (like diphenhydramine) can dry out your skin as a side effect [2].

The temptation to over-exfoliate. After winter dullness, there's a desire to scrub away the dead layer. Resist the urge to go aggressive with exfoliation. Gentle chemical exfoliation (your retinoid or a mild AHA) is fine. Physical scrubs and at-home peels are not the answer.

Spring adjustments:

• Switch from heavy cream moisturizer to a lighter lotion
• Continue your retinoid if you're on one
• Start paying attention to sunscreen if you got lazy about it during winter
• If pollen triggers you, wash your face when you come inside

Summer: oil management mode

Summer is when acne-prone skin often has its hardest time. More heat, more humidity, more sweat, more sunscreen (which can clog pores), more time outdoors.

Why summer breakouts happen. Heat increases sebum production. Humidity swells the outer layer of skin, contributing to pore clogging. Sweat mixes with bacteria and dead skin cells on your skin's surface. Sunscreen, while necessary, adds another layer that can trap all of the above [1, 7].

Sunscreen is non-negotiable. I know it can feel counterintuitive when sunscreen seems to contribute to breakouts, but UV damage makes acne worse in the long run and causes post-inflammatory hyperpigmentation (those dark marks left behind by pimples) to darken. Use a lightweight, non-comedogenic sunscreen. Gel or fluid formulations tend to work better on acne-prone skin than thick creams [4].

Sweat management. If you exercise outdoors or just sweat a lot in summer, wash your face as soon as possible after sweating. Don't let sweat sit on your skin. Keep blotting papers or a clean microfiber cloth in your bag for midday oil absorption.

Summer adjustments:

• Switch to a gel-based or foaming cleanser if you use a cream cleanser
• Use a lightweight, gel-based moisturizer (or skip moisturizer on very humid days if your skin is oily enough)
• Apply sunscreen daily, reapplying every 2 hours if you're outdoors
• Consider benzoyl peroxide wash in the shower to manage body acne from sweat
• Use blotting papers for midday oil

Fall: retinoid season

Fall is, in my opinion, the best time to start or restart a retinoid (adapalene, tretinoin). Here's why:

Retinoids make your skin more sensitive to UV radiation [3]. Starting a retinoid in June, when you're getting maximum sun exposure, means you're fighting both acne and the sun simultaneously. Starting in September or October means you have months of lower UV exposure for your skin to adjust. By the time summer rolls around again, your skin will be acclimated to the retinoid and better able to handle it with sunscreen.

If you stopped your retinoid during summer because of sun sensitivity, fall is when you bring it back. Start slow (every other night for 2 weeks, then nightly) even if you were using it daily before. Your skin's tolerance resets after a break.

Fall adjustments:

• Start or restart retinoid
• Transition from lightweight gel moisturizer back to a lotion or cream
• Continue sunscreen (UV is lower but still present)
• Begin thinking about barrier repair as air gets drier

Winter: barrier repair mode

Winter is when acne-prone skin faces a different challenge. Cold, dry air (both outdoors and from indoor heating) strips moisture from your skin. Your skin barrier gets compromised, leading to dryness, flaking, and irritation. And here's the frustrating part: compromised barrier skin is actually more acne-prone, not less [5, 7].

When your skin barrier is damaged, it overcompensates by producing more oil. It also becomes more permeable to bacteria and irritants. So you end up with skin that's simultaneously dry and oily, flaky and breaking out. It's miserable.

Moisturizer matters most in winter. This is when you might need a heavier cream instead of a lotion. CeraVe Moisturizing Cream (in the tub) is a popular choice because it contains ceramides that help repair the skin barrier [5].

Humidifier. Running a humidifier in your bedroom while you sleep adds moisture to the air and prevents your skin from losing as much water overnight. This is one of the most underrated winter skincare moves. A basic cool-mist humidifier costs $20-30 and makes a real difference.

Don't drop your retinoid -- just buffer it. If your retinoid is too irritating in dry winter air, apply your moisturizer first, wait 10-15 minutes, then apply the retinoid on top. This "buffering" technique reduces irritation while maintaining effectiveness [6].

Winter adjustments:

• Switch to a cream moisturizer (heavier than summer lotion)
• Consider a gentle, cream-based cleanser instead of a foaming one
• Use a humidifier in your bedroom
• Buffer your retinoid if dryness becomes an issue
• Don't forget sunscreen (UV reflects off snow and you're still getting exposure)

The 2-week transition rule

Here's a principle that's served me well: start transitioning your routine about 2-3 weeks before the season fully changes. Don't wait until your skin is already irritated, dry, or breaking out to adjust.

If you live somewhere where September is when the air starts getting dry, start incorporating a richer moisturizer in mid-August. If June is when humidity spikes, lighten your routine in mid-May.

The point is to stay ahead of the change rather than reacting to it. Your skin responds better to gradual transitions than sudden product swaps.

Products that work year-round

Not everything needs to change seasonally. Some products stay constant:

Your active treatment. Adapalene, benzoyl peroxide, or whatever your primary acne-fighting ingredient is -- this stays in your routine year-round (with possible adjustments to frequency or buffering in winter) [3].

A gentle cleanser. You might switch between a foaming version (summer) and a cream version (winter) of the same brand, but you always need a cleanser.

Sunscreen. Type may change (lighter in summer, more moisturizing in winter), but sunscreen is a year-round product.

Spot treatments. Hydrocolloid patches, benzoyl peroxide spot treatment -- these are season-independent.

What changes by season: quick reference

	Spring	Summer	Fall	Winter
Cleanser	Transition to lighter	Gel/foaming	Moderate	Cream/gentle
Moisturizer	Light lotion	Gel/skip	Lotion	Heavy cream
Sunscreen	Yes, lightweight	Yes, reapply often	Yes	Yes, moisturizing
Retinoid	Continue	Continue (with sunscreen)	Start/restart	Buffer if needed
Extra	Allergy management	Sweat management	Barrier prep	Humidifier

Bottom line

Your skin lives in the same climate you do, and it responds to seasonal changes in humidity, temperature, and UV exposure. The fix isn't complicated: lighten your routine for summer, strengthen it for winter, use fall to start retinoids, and transition before your skin forces you to. Keep your active treatments consistent year-round and adjust the supporting players. Two minutes of seasonal planning prevents weeks of unexpected breakouts.

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Sources

1. Pascoe VL, et al. "Seasonal variation in acne." Dermatology Online Journal. 2015;21(11):1-4.
2. Goad N, Gawkrodger DJ. "Ambient humidity and the skin: the impact of air humidity in healthy and diseased states." Journal of the European Academy of Dermatology and Venereology. 2016;30(8):1285-1294.
3. Zaenglein AL, et al. "Guidelines of care for the management of acne vulgaris." Journal of the American Academy of Dermatology. 2016;74(5):945-973.
4. American Academy of Dermatology. "Sunscreen FAQs." 2024.
5. Draelos ZD. "The science behind skin care: moisturizers." Journal of Cosmetic Dermatology. 2018;17(2):138-144.
6. Del Rosso JQ. "The role of skin care as an integral component in the management of acne vulgaris." Journal of Clinical and Aesthetic Dermatology. 2013;6(12):19-27.
7. Engebretsen KA, et al. "The effect of environmental humidity and temperature on skin barrier function." Journal of the European Academy of Dermatology and Venereology. 2016;30(2):223-249.