Across the year, daylight in Portland, Maine ranges from about 8h 44m in December to 15h 16m in June — a 6h 31m swing that shapes sleep, mood and training rhythms. From roughly November through February, the sun sits too low for much vitamin D production.
The nearest other Live10X city guide is Portsmouth, about 48 miles away.
Portland, Maine by the numbers
- County
- Cumberland County
- Climate
- Humid continental
- Elevation
- near sea level
- Latitude
- 43.7°N
- Shortest day
- 8h 44m
- Longest day
- 15h 16m
- Vitamin D winter
- November through February
At a glance
Portland, Maine at a glance
- Top local priority in Portland, Maine: a winter movement plan.
- Daylight swings from about 8h 44m to 15h 16m across the year — anchor your wake time and get morning light.
- Sunlight is too weak for much vitamin D production from roughly November through February; a blood test shows where you stand.
- Use the Eastern Promenade Trail and the Back Cove Trail for easy, regular outdoor movement.
Climate & lifestyle
What living in Portland, Maine means for your health
Portland, Maine has a humid continental climate — four distinct seasons, with warm to hot summers and cold winters that bring snow and short days. Seasonal shifts in light and temperature affect sleep, mood, activity and vitamin D, so a winter plan matters as much as a summer one.
- a winter movement plan
- morning light and vitamin D awareness
- winter light and vitamin D awareness
- consistent sleep through seasonal shifts
Light, sleep & vitamin D
Daylight in Portland, Maine across the year
8h 44m
Shortest day (December)
15h 16m
Longest day (June)
~4 mo
Low-UVB “vitamin D winter”
At about 43.7°N, Portland, Maine sees a 6h 31m swing in day length between the solstices. At this latitude, winter sunlight is too weak for meaningful vitamin D production for roughly four months. That's roughly November through February. Bright morning light helps anchor your body clock, and a simple blood test shows whether your vitamin D is where it should be.
Calculated from latitude using standard solar formulas and published latitude research. How we calculate this
Local wellness trends
Wellness trends in Portland, Maine
Winter wellness
Long winters in Portland, Maine have made indoor training, saunas and morning-light routines part of the local playbook.
Food culture & personalized nutrition
Portland, Maine's food scene puts farmers markets and diverse cuisines within reach, fueling interest in gut health and nutrigenomics.
Outdoor-first fitness
Trails and open space around Portland, Maine make zone 2 cardio feel like recreation — the kind of exercise people actually stick with.
Beach & waterfront workouts
Sunrise walks, beach runs and open-water swims along the Atlantic give Portland, Maine a natural outdoor gym.
Local health optimization resources
Places to move, recover and eat well in Portland, Maine
- Trailthe Eastern Promenade TrailCar-free miles for zone 2 walks, runs and rides.
- Trailthe Back Cove TrailCar-free miles for zone 2 walks, runs and rides.
- ParkFort Williams Park and Portland Head LightGreen space for walks, bodyweight workouts and time in nature.
Testing
At-home wellness genetic testing
Available throughout Portland, Maine: order online, collect a sample at home and review results with a qualified professional.
Learn more about at-home wellness genetic testingHealthcare
Preventive care & baseline labs
Primary care clinicians in Cumberland County can order baseline labs — such as a lipid panel, HbA1c, vitamin D and B12 — useful context for any wellness plan.
Learn more about preventive care & baseline labsNutrition
Farmers markets & local food
Portland, Maine's food scene makes it easier to eat 30+ different plants a week — shop seasonal produce at local farmers markets.
Learn more about farmers markets & local foodSeasonal playbook
A seasonal wellness playbook for Portland, Maine
- Winter: short days call for morning light, indoor strength and cardio plans, and a consistent wake time.
- Spring and fall: prime seasons for outdoor running, cycling and hiking.
- Summer: humid heat waves happen — hydrate well and train early on the hottest days.
- Winter light: with only about 8h 44m of daylight in December, get outside in the morning and keep indoor lighting bright during the day.
Recommended reading
The most relevant guides for Portland, Maine residents
FAQ
Portland, Maine wellness FAQs
Do I need to visit a clinic in Portland, Maine for a wellness genetic test?
How do you stay active through Portland, Maine's winters?
Can you get enough vitamin D from the sun in Portland, Maine?
How do seasonal daylight changes in Portland, Maine affect sleep?
Where can you walk, run or train outdoors in Portland, Maine?
The bottom line
Living well in Portland, Maine means working with its warm summers and cold, snowy winters: a winter movement plan, morning light and vitamin D awareness and winter light and vitamin D awareness. Add the fundamentals — consistent sleep, daily movement, strength training and a whole-food diet — and personalize with the wellness assessment and at-home testing.
