Lisbon, Portugal vs Porto, Portugal for retirement

Use: Planning estimate; not used to determine comparison winners.

Evidence: Hybrid

Reason: Budget Ranking Ineligible

Basis: Estimated

Source: Statistics Portugal / INE; European Central Bank; ERSAR; Eurostat

Data period: INE rent Trailing 12 months ending March 2026; Census 2021; ECB 2026-07-15; ERSAR 2025; Eurostat 2025-S2/2025-S2; ECB 2026-07-10; Eurostat HBS/PPP 2020; HICP 2025

How measured: Model-limited comfortable-living estimate built from the Portugal one-retiree cash-spending budget plus disclosed short-term housing, dining, mobility, and coworking adjustments. The separately sourced utility bundle and out-of-pocket healthcare component remain included; renter property tax is not applicable; income taxes are excluded; no undisclosed buffer is included.

Use: Planning estimate; not used to determine comparison winners.

Evidence: Hybrid

Reason: Budget Ranking Ineligible

Basis: Estimated

Source: Statistics Portugal / INE; European Central Bank; ERSAR; Eurostat

Data period: INE rent Trailing 12 months ending March 2026; Census 2021; ECB 2026-07-15; ERSAR 2025; Eurostat 2025-S2/2025-S2; ECB 2026-07-10; Eurostat HBS/PPP 2020; HICP 2025

How measured: Model-limited comfortable-living estimate built from the Portugal one-retiree cash-spending budget plus disclosed short-term housing, dining, mobility, and coworking adjustments. The separately sourced utility bundle and out-of-pocket healthcare component remain included; renter property tax is not applicable; income taxes are excluded; no undisclosed buffer is included.

Use: Planning estimate; not used to determine comparison winners.

Evidence: Modeled

Reason: Model Limited

Basis: Estimated

Source: Statistics Portugal / INE; European Central Bank

Data period: INE rent Trailing 12 months ending March 2026; Census 2021; ECB 2026-07-15

How measured: Statistics Portugal trailing-12-month municipality median rent per useful square meter for new lease agreements is multiplied by the midpoint of that municipality's 2021 Census weighted-median useful-area band for two-division and three-division usual-residence dwellings, then converted with the ECB EUR/USD reference rate. This row uses the T1 proxy: two divisions profile and 30 m² - 39 m² weighted-median area band. These are planning profiles, not observed bedroom-specific lease amounts. T1 and T2 are proxied by two and three Census divisions, the rent-per-square-meter source covers all dwelling typologies, and the dwelling-size distribution is from 2021. The published range preserves the full weighted-median area band.

Use: Planning estimate; not used to determine comparison winners.

Evidence: Modeled

Reason: Model Limited

Basis: Estimated

Source: Statistics Portugal / INE; European Central Bank

Data period: INE rent Trailing 12 months ending March 2026; Census 2021; ECB 2026-07-15

How measured: Statistics Portugal trailing-12-month municipality median rent per useful square meter for new lease agreements is multiplied by the midpoint of that municipality's 2021 Census weighted-median useful-area band for two-division and three-division usual-residence dwellings, then converted with the ECB EUR/USD reference rate. This row uses the T1 proxy: two divisions profile and 30 m² - 39 m² weighted-median area band. These are planning profiles, not observed bedroom-specific lease amounts. T1 and T2 are proxied by two and three Census divisions, the rent-per-square-meter source covers all dwelling typologies, and the dwelling-size distribution is from 2021. The published range preserves the full weighted-median area band.

Evidence: Derived

Basis: Estimated

Source: NOAA/NASA source-backed climate component formula

How measured: Derived climate score formula v1: Summer Feel is scored from annual days above 90F; Winter Feel is scored from annual days below freezing; Climate Comfort averages Summer Feel, Winter Feel, and source-backed comfortable-months score.

Evidence: Derived

Basis: Estimated

Source: NOAA/NASA source-backed climate component formula

How measured: Derived climate score formula v1: Summer Feel is scored from annual days above 90F; Winter Feel is scored from annual days below freezing; Climate Comfort averages Summer Feel, Winter Feel, and source-backed comfortable-months score.

Evidence: Derived

Basis: Estimated

Source: NOAA/NASA source-backed climate component formula

How measured: Derived climate score formula v1: Summer Feel is scored from annual days above 90F; Winter Feel is scored from annual days below freezing; Climate Comfort averages Summer Feel, Winter Feel, and source-backed comfortable-months score.

Evidence: Derived

Basis: Estimated

Source: NOAA/NASA source-backed climate component formula

How measured: Derived climate score formula v1: Summer Feel is scored from annual days above 90F; Winter Feel is scored from annual days below freezing; Climate Comfort averages Summer Feel, Winter Feel, and source-backed comfortable-months score.

Use: Planning estimate; not used to determine comparison winners.

Evidence: Modeled

Reason: Modeled Requires Reviewed Decision

Basis: Modeled

Source: Open-Meteo / Copernicus CAMS

Observed: 2026-05-18T17:35:06.466Z

How measured: Air Quality is scored from the 2021-2025 average of 43824 hourly Copernicus CAMS PM2.5 model values at the city coordinate. No nearby qualifying EPA multiyear monitor is available, so this remains explicitly modeled.

Use: Planning estimate; not used to determine comparison winners.

Evidence: Modeled

Reason: Modeled Requires Reviewed Decision

Basis: Modeled

Source: Open-Meteo / Copernicus CAMS

Observed: 2026-05-18T18:10:58.633Z

How measured: Air Quality is scored from the 2021-2025 average of 43824 hourly Copernicus CAMS PM2.5 model values at the city coordinate. No nearby qualifying EPA multiyear monitor is available, so this remains explicitly modeled.

Evidence: Observed

Basis: City-level

Source: Speedtest by Ookla Open Data

How measured: Weighted median of fixed-broadband tile average download speeds within city radius, weighted by tests. Observation window ended 2026-03-31.

Evidence: Observed

Basis: City-level

Source: Speedtest by Ookla Open Data

How measured: Weighted median of fixed-broadband tile average download speeds within city radius, weighted by tests. Observation window ended 2026-03-31.